diff --git a/lib/classes/plugin_manager.php b/lib/classes/plugin_manager.php
index c7a053e0242..54bf27cb7e3 100644
--- a/lib/classes/plugin_manager.php
+++ b/lib/classes/plugin_manager.php
@@ -1958,6 +1958,7 @@ class core_plugin_manager {
                 'importquestions',
                 'managecategories',
                 'previewquestion',
+                'statistics',
                 'tagquestion',
                 'viewcreator',
                 'viewquestionname',
diff --git a/question/bank/statistics/classes/columns/discrimination_index.php b/question/bank/statistics/classes/columns/discrimination_index.php
new file mode 100644
index 00000000000..9110947df59
--- /dev/null
+++ b/question/bank/statistics/classes/columns/discrimination_index.php
@@ -0,0 +1,56 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace qbank_statistics\columns;
+
+use core_question\local\bank\column_base;
+use qbank_statistics\helper;
+/**
+ * Discrimination index column
+ *
+ * @package    qbank_statistics
+ * @copyright  2021 Catalyst IT Australia Pty Ltd
+ * @author     Nathan Nguyen <nathannguyen@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class discrimination_index extends column_base {
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function get_title(): string {
+        return get_string('discrimination_index', 'qbank_statistics');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function get_name(): string {
+        return 'discrimination_index';
+    }
+
+    /**
+     * Output the contents of this column.
+     * @param object $question the row from the $question table, augmented with extra information.
+     * @param string $rowclasses CSS class names that should be applied to this row of output.
+     */
+    protected function display_content($question, $rowclasses) {
+        global $PAGE;
+        // Average discrimination index per quiz.
+        $discriminationindex = helper::calculate_average_question_discrimination_index($question->id);
+        echo $PAGE->get_renderer('qbank_statistics')->render_discrimination_index($discriminationindex);
+    }
+}
diff --git a/question/bank/statistics/classes/columns/discriminative_efficiency.php b/question/bank/statistics/classes/columns/discriminative_efficiency.php
new file mode 100644
index 00000000000..381d02a1851
--- /dev/null
+++ b/question/bank/statistics/classes/columns/discriminative_efficiency.php
@@ -0,0 +1,56 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace qbank_statistics\columns;
+
+use core_question\local\bank\column_base;
+use qbank_statistics\helper;
+/**
+ * Discriminative efficiency column
+ *
+ * @package    qbank_statistics
+ * @copyright  2021 Catalyst IT Australia Pty Ltd
+ * @author     Nathan Nguyen <nathannguyen@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class discriminative_efficiency extends column_base {
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function get_title(): string {
+        return get_string('discriminative_efficiency', 'qbank_statistics');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function get_name(): string {
+        return 'discriminative_efficiency';
+    }
+
+    /**
+     * Output the contents of this column.
+     * @param object $question the row from the $question table, augmented with extra information.
+     * @param string $rowclasses CSS class names that should be applied to this row of output.
+     */
+    protected function display_content($question, $rowclasses) {
+        global $PAGE;
+        // Average discriminative efficiency per quiz.
+        $discriminativeefficiency = helper::calculate_average_question_discriminative_efficiency($question->id);
+        echo $PAGE->get_renderer('qbank_statistics')->render_discriminative_efficiency($discriminativeefficiency);
+    }
+}
diff --git a/question/bank/statistics/classes/columns/facility_index.php b/question/bank/statistics/classes/columns/facility_index.php
new file mode 100644
index 00000000000..8c11b95984b
--- /dev/null
+++ b/question/bank/statistics/classes/columns/facility_index.php
@@ -0,0 +1,56 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace qbank_statistics\columns;
+
+use core_question\local\bank\column_base;
+use qbank_statistics\helper;
+/**
+ * Facility index column
+ *
+ * @package    qbank_statistics
+ * @copyright  2021 Catalyst IT Australia Pty Ltd
+ * @author     Nathan Nguyen <nathannguyen@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class facility_index extends column_base {
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function get_title(): string {
+        return get_string('facility_index', 'qbank_statistics');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function get_name(): string {
+        return 'facility_index';
+    }
+
+    /**
+     * Output the contents of this column.
+     * @param object $question the row from the $question table, augmented with extra information.
+     * @param string $rowclasses CSS class names that should be applied to this row of output.
+     */
+    protected function display_content($question, $rowclasses) {
+        global $PAGE;
+        // Average facility index per quiz.
+        $facility = helper::calculate_average_question_facility($question->id);
+        echo $PAGE->get_renderer('qbank_statistics')->render_facility_index($facility);
+    }
+}
diff --git a/question/bank/statistics/classes/helper.php b/question/bank/statistics/classes/helper.php
new file mode 100644
index 00000000000..484eb510796
--- /dev/null
+++ b/question/bank/statistics/classes/helper.php
@@ -0,0 +1,214 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace qbank_statistics;
+
+defined('MOODLE_INTERNAL') || die();
+require_once($CFG->dirroot . '/mod/quiz/report/statistics/statisticslib.php');
+require_once($CFG->dirroot . '/mod/quiz/report/default.php');
+require_once($CFG->dirroot . '/mod/quiz/report/statistics/report.php');
+require_once($CFG->dirroot . '/mod/quiz/report/reportlib.php');
+require_once($CFG->dirroot . '/mod/quiz/attemptlib.php');
+use core_question\statistics\questions\all_calculated_for_qubaid_condition;
+use quiz_statistics_report;
+/**
+ * Helper for statistics
+ *
+ * @package    qbank_statistics
+ * @copyright  2021 Catalyst IT Australia Pty Ltd
+ * @author     Nathan Nguyen <nathannguyen@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class helper {
+
+    /**
+     * @var float Threshold to determine 'need for revision'
+     */
+    private const NEED_FOR_REVISION_LOWER_THRESHOLD = 30;
+
+    /**
+     * @var float Threshold to determine 'need for revision'
+     */
+    private const NEED_FOR_REVISION_UPPER_THRESHOLD = 50;
+
+    /**
+     * Return ids of all quizzes that use the question
+     *
+     * @param int $questionid id of the question
+     * @return array list of quizids
+     * @throws \dml_exception
+     */
+    public static function get_quizzes(int $questionid): array {
+        global $DB;
+
+        $quizzes = $DB->get_fieldset_sql("
+             SELECT DISTINCT qa.quiz as id
+                        FROM {quiz_attempts} qa
+                        JOIN {question_usages} qu ON qu.id = qa.uniqueid
+                        JOIN {question_attempts} qatt ON qatt.questionusageid = qu.id
+                       WHERE qatt.questionid = :questionid", ['questionid' => $questionid]);
+        return $quizzes;
+    }
+
+    /**
+     * Load question stats from a quiz
+     *
+     * @param int $quizid quiz object or its id
+     * @return all_calculated_for_qubaid_condition
+     */
+    private static function load_question_stats(int $quizid): all_calculated_for_qubaid_condition {
+        // Turn to quiz object.
+        $quiz = new \stdClass();
+        $quiz->id = $quizid;
+        // All questions, no groups.
+        $report = new quiz_statistics_report();
+        $questions = $report->load_and_initialise_questions_for_calculations($quiz);
+        $qubaids = quiz_statistics_qubaids_condition($quiz->id, new \core\dml\sql_join());
+        $progress = new \core\progress\none();
+        $qcalc = new \core_question\statistics\questions\calculator($questions, $progress);
+        $quizcalc = new \quiz_statistics\calculator($progress);
+        if ($quizcalc->get_last_calculated_time($qubaids) === false) {
+            $questionstats = $qcalc->calculate($qubaids);
+        } else {
+            $questionstats = $qcalc->get_cached($qubaids);
+        }
+        return $questionstats;
+    }
+
+    /**
+     * Load a specified stats item for a question
+     *
+     * @param int $quizid quiz id
+     * @param int $questionid question id
+     * @param string $item a stats item
+     * @return float|int
+     */
+    public static function load_question_stats_item(int $quizid, int $questionid, string $item): ?float {
+        $questionstats = self::load_question_stats($quizid);
+        // Find in main question.
+        foreach ($questionstats->questionstats as $stats) {
+            if ($stats->questionid == $questionid && isset($stats->$item)) {
+                return $stats->$item;
+            }
+        }
+        // If not found, find in sub questions.
+        foreach ($questionstats->subquestionstats as $stats) {
+            if ($stats->questionid == $questionid && isset($stats->$item)) {
+                return $stats->$item;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Calculate average for a stats item on a question.
+     *
+     * @param int $questionid id of the question
+     * @param string $item stats item
+     * @return float|null
+     */
+    private static function calculate_average_question_stats_item(int $questionid, string $item): ?float {
+        $quizzes = self::get_quizzes($questionid);
+
+        $sum = 0;
+        $quizcount = count($quizzes);
+        foreach ($quizzes as $quizid) {
+            $value = self::load_question_stats_item($quizid, $questionid, $item);
+            if (!is_null($value)) {
+                $sum += $value;
+            } else {
+                // Exclude this value when it is null.
+                $quizcount--;
+            }
+        }
+
+        // Return null if there is no quizzes.
+        if (empty($quizcount)) {
+            return null;
+        }
+
+        // Average value per quiz.
+        $average = $sum / $quizcount;
+        return $average;
+    }
+
+    /**
+     * Calculate average facility index
+     *
+     * @param int $questionid
+     * @return float|null
+     */
+    public static function calculate_average_question_facility(int $questionid): ?float {
+        return self::calculate_average_question_stats_item($questionid, 'facility');
+    }
+
+    /**
+     * Calculate average discriminative efficiency
+     *
+     * @param int $questionid question id
+     * @return float|null
+     */
+    public static function calculate_average_question_discriminative_efficiency(int $questionid): ?float {
+        return self::calculate_average_question_stats_item($questionid, 'discriminativeefficiency');
+    }
+
+    /**
+     * Calculate average discriminative efficiency
+     *
+     * @param int $questionid question id
+     * @return float|null
+     */
+    public static function calculate_average_question_discrimination_index(int $questionid): ?float {
+        return self::calculate_average_question_stats_item($questionid, 'discriminationindex');
+    }
+
+    /**
+     * Format a number to a localised percentage with specified decimal points.
+     *
+     * @param float|null $number The number being formatted
+     * @param bool $fraction An indicator for whether the number is a fraction or is already multiplied by 100
+     * @param int $decimals Sets the number of decimal points
+     * @return string
+     * @throws \coding_exception
+     */
+    public static function format_percentage(?float $number, bool $fraction = true, int $decimals = 2): string {
+        if (is_null($number)) {
+            return get_string('na', 'qbank_statistics');
+        }
+        $coefficient = $fraction ? 100 : 1;
+        return get_string('percents', 'moodle', format_float($number * $coefficient, $decimals));
+    }
+
+    /**
+     * Format discrimination index (need for revision).
+     *
+     * @param float|null $value stats value
+     * @return array
+     */
+    public static function format_discrimination_index(?float $value): array {
+        if (is_null($value) || $value < self::NEED_FOR_REVISION_LOWER_THRESHOLD) {
+            $content = get_string('verylikely', 'qbank_statistics');
+            $classes = 'alert-danger';
+        } else if ($value < self::NEED_FOR_REVISION_UPPER_THRESHOLD) {
+            $content = get_string('likely', 'qbank_statistics');
+            $classes = 'alert-warning';
+        } else {
+            $content = get_string('unlikely', 'qbank_statistics');
+            $classes = 'alert-success';
+        }
+        return [$content, $classes];
+    }
+}
diff --git a/question/bank/statistics/classes/output/renderer.php b/question/bank/statistics/classes/output/renderer.php
new file mode 100644
index 00000000000..9e14ff7659f
--- /dev/null
+++ b/question/bank/statistics/classes/output/renderer.php
@@ -0,0 +1,64 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace qbank_statistics\output;
+
+use qbank_statistics\helper;
+/**
+ * Description
+ *
+ * @package    qbank_statistics
+ * @copyright  2021 Catalyst IT Australia Pty Ltd
+ * @author     Nathan Nguyen <nathannguyen@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class renderer extends \plugin_renderer_base {
+
+    /**
+     * Render facility index column.
+     *
+     * @param float|null $facility facility index
+     * @return string
+     */
+    public function render_facility_index(?float $facility): string {
+        $displaydata['facility_index'] = helper::format_percentage($facility);
+        return $this->render_from_template('qbank_statistics/facility_index', $displaydata);
+    }
+
+    /**
+     * Render discriminative_efficiency column.
+     *
+     * @param float|null $discriminativeefficiency discriminative efficiency
+     * @return string
+     */
+    public function render_discriminative_efficiency(?float $discriminativeefficiency): string {
+        $displaydata['discriminative_efficiency'] = helper::format_percentage($discriminativeefficiency, false);
+        return $this->render_from_template('qbank_statistics/discriminative_efficiency', $displaydata);
+    }
+
+    /**
+     * Render discrimination index column.
+     *
+     * @param float|null $discriminationindex discrimination index
+     * @return string
+     */
+    public function render_discrimination_index(?float $discriminationindex): string {
+        list($content, $classes) = helper::format_discrimination_index($discriminationindex);
+        $displaydata['discrimination_index'] = $content;
+        $displaydata['classes'] = $classes;
+        return $this->render_from_template('qbank_statistics/discrimination_index', $displaydata);
+    }
+}
diff --git a/question/bank/statistics/classes/plugin_feature.php b/question/bank/statistics/classes/plugin_feature.php
new file mode 100644
index 00000000000..8f97436bb72
--- /dev/null
+++ b/question/bank/statistics/classes/plugin_feature.php
@@ -0,0 +1,45 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace qbank_statistics;
+
+use qbank_statistics\columns\facility_index;
+use qbank_statistics\columns\discrimination_index;
+use qbank_statistics\columns\discriminative_efficiency;
+/**
+ * Class plugin_features is the entrypoint for the columns.
+ *
+ * @package    qbank_statistics
+ * @copyright  2021 Catalyst IT Australia Pty Ltd
+ * @author     Nathan Nguyen <nathannguyen@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class plugin_feature extends \core_question\local\bank\plugin_features_base {
+
+    /**
+     * This method will return the array of objects to be rendered as a prt of question bank columns/actions.
+     *
+     * @param view $qbank
+     * @return array
+     */
+    public function get_question_columns($qbank): array {
+        return [
+            new discrimination_index($qbank),
+            new facility_index($qbank),
+            new discriminative_efficiency($qbank)
+        ];
+    }
+}
diff --git a/question/bank/statistics/classes/privacy/provider.php b/question/bank/statistics/classes/privacy/provider.php
new file mode 100644
index 00000000000..9f11fc2db3c
--- /dev/null
+++ b/question/bank/statistics/classes/privacy/provider.php
@@ -0,0 +1,34 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace qbank_statistics\privacy;
+
+/**
+ * Privacy Subsystem implementation.
+ *
+ * @package    qbank_statistics
+ * @copyright  2021 Catalyst IT Australia Pty Ltd
+ * @author     Nathan Nguyen <nathannguyen@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class provider implements \core_privacy\local\metadata\null_provider {
+    /**
+     * {@inheritdoc}
+     */
+    public static function get_reason(): string {
+        return 'privacy:metadata';
+    }
+}
diff --git a/question/bank/statistics/lang/en/qbank_statistics.php b/question/bank/statistics/lang/en/qbank_statistics.php
new file mode 100644
index 00000000000..ef0f69e20bb
--- /dev/null
+++ b/question/bank/statistics/lang/en/qbank_statistics.php
@@ -0,0 +1,40 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Strings for component qbank_statistics, language 'en'
+ *
+ * @package    qbank_statistics
+ * @copyright  2021 Catalyst IT Australia Pty Ltd
+ * @author     Nathan Nguyen <nathannguyen@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+$string['pluginname'] = 'Question statistics';
+$string['privacy:metadata'] = 'Question statistics plugin does not store any user data.';
+
+// Columns.
+$string['facility_index'] = 'Facility index';
+$string['discriminative_efficiency'] = 'Discriminative efficiency';
+$string['discrimination_index'] = 'Need for revision';
+
+// Text format.
+$string['verylikely'] = 'very likely';
+$string['likely'] = 'likely';
+$string['unlikely'] = 'unlikely';
+$string['na'] = 'N/A';
diff --git a/question/bank/statistics/templates/discrimination_index.mustache b/question/bank/statistics/templates/discrimination_index.mustache
new file mode 100644
index 00000000000..15133914ab6
--- /dev/null
+++ b/question/bank/statistics/templates/discrimination_index.mustache
@@ -0,0 +1,31 @@
+{{!
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template qbank_statistics/discrimination_index
+    Example context (json):
+    {
+        "statistics": [
+            {
+                "discriminative_efficiency": "html content"
+            }
+        ]
+    }
+}}
+
+<div class="qbank_statistics discrimination_index {{classes}}">
+    {{{discrimination_index}}}
+</div>
diff --git a/question/bank/statistics/templates/discriminative_efficiency.mustache b/question/bank/statistics/templates/discriminative_efficiency.mustache
new file mode 100644
index 00000000000..bcff7d033d9
--- /dev/null
+++ b/question/bank/statistics/templates/discriminative_efficiency.mustache
@@ -0,0 +1,31 @@
+{{!
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template qbank_statistics/discriminative_efficiency
+    Example context (json):
+    {
+        "statistics": [
+            {
+                "discriminative_efficiency": "html content"
+            }
+        ]
+    }
+}}
+
+<div class="qbank_statistics discriminative_efficiency">
+    {{{discriminative_efficiency}}}
+</div>
diff --git a/question/bank/statistics/templates/facility_index.mustache b/question/bank/statistics/templates/facility_index.mustache
new file mode 100644
index 00000000000..8aed4b4f940
--- /dev/null
+++ b/question/bank/statistics/templates/facility_index.mustache
@@ -0,0 +1,31 @@
+{{!
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template qbank_statistics/facility_index
+    Example context (json):
+    {
+        "statistics": [
+            {
+                "facility_index": "html content"
+            }
+        ]
+    }
+}}
+
+<div class="qbank_statistics facility_index">
+    {{{facility_index}}}
+</div>
diff --git a/question/bank/statistics/tests/behat/statistics_action.feature b/question/bank/statistics/tests/behat/statistics_action.feature
new file mode 100644
index 00000000000..a9cc033d460
--- /dev/null
+++ b/question/bank/statistics/tests/behat/statistics_action.feature
@@ -0,0 +1,35 @@
+@qbank @qbank_statistics
+Feature: Use the qbank plugin manager page for statistics
+  In order to check the plugin behaviour with enable and disable
+
+  Background:
+    Given the following "courses" exist:
+      | fullname | shortname | category |
+      | Course 1 | C1        | 0        |
+    And the following "activities" exist:
+      | activity   | name      | course | idnumber |
+      | quiz       | Test quiz | C1     | quiz1    |
+    And the following "question categories" exist:
+      | contextlevel | reference | name           |
+      | Course         | C1     | Test questions |
+    And the following "questions" exist:
+      | questioncategory | qtype     | name           | questiontext              |
+      | Test questions   | truefalse | First question | Answer the first question |
+
+  Scenario: Enable/disable statistics columns from the base view
+    Given I log in as "admin"
+    When I navigate to "Plugins > Question bank plugins > Manage question bank plugins" in site administration
+    And I should see "Question statistics"
+    And I click on "Disable" "link" in the "Question statistics" "table_row"
+    And I am on the "Test quiz" "quiz activity" page
+    And I navigate to "Question bank > Questions" in current page administration
+    Then I should not see "Facility index"
+    And I should not see "Discriminative efficiency"
+    And I should not see "Need for revision"
+    And I navigate to "Plugins > Question bank plugins > Manage question bank plugins" in site administration
+    And I click on "Enable" "link" in the "Question statistics" "table_row"
+    And I am on the "Test quiz" "quiz activity" page
+    And I navigate to "Question bank > Questions" in current page administration
+    And I should see "Facility index"
+    And I should see "Discriminative efficiency"
+    And I should see "Need for revision"
diff --git a/question/bank/statistics/tests/behat/statistics_values.feature b/question/bank/statistics/tests/behat/statistics_values.feature
new file mode 100644
index 00000000000..26015d44e48
--- /dev/null
+++ b/question/bank/statistics/tests/behat/statistics_values.feature
@@ -0,0 +1,136 @@
+@qbank @qbank_statistics
+Feature: Show statistics in question bank
+
+  Background:
+    Given the following "courses" exist:
+      | fullname | shortname | category |
+      | Course 1 | C1        | 0        |
+    And the following "users" exist:
+      | username | firstname | lastname | email                |
+      | student1 | user1     | Student1 | student1@example.com |
+      | student2 | user2     | Student2 | student2@example.com |
+      | student3 | user3     | Student3 | student3@example.com |
+      | student4 | user4     | Student4 | student4@example.com |
+    And the following "course enrolments" exist:
+      | user     | course | role           |
+      | student1 | C1     | student        |
+      | student2 | C1     | student        |
+    And the following "question categories" exist:
+      | contextlevel | reference | name           |
+      | Course       | C1        | Test questions |
+    And the following "questions" exist:
+      | questioncategory | qtype       | name  | questiontext    |
+      | Test questions   | truefalse   | TF1   | First question  |
+      | Test questions   | truefalse   | TF2   | Second question |
+      | Test questions   | truefalse   | TF3   | Third question  |
+      | Test questions   | truefalse   | TF4   | Fourth question |
+    And the following "activities" exist:
+      | activity   | name   | intro              | course | idnumber |
+      | quiz       | Quiz 1 | Quiz 1 description | C1     | quiz1    |
+      | quiz       | Quiz 2 | Quiz 2 description | C1     | quiz2    |
+    And quiz "Quiz 1" contains the following questions:
+      | question | page | maxmark |
+      | TF1      | 1    | 1.0     |
+      | TF2      | 1    | 1.0     |
+      | TF3      | 1    | 1.0     |
+      | TF4      | 1    | 1.0     |
+    And quiz "Quiz 2" contains the following questions:
+      | question | page | maxmark |
+      | TF2      | 1    | 1.0     |
+      | TF3      | 1    | 1.0     |
+    And user "student1" has attempted "Quiz 1" with responses:
+      | slot | response |
+      |   1  | False    |
+      |   2  | False    |
+      |   3  | False    |
+      |   4  | False    |
+    And user "student2" has attempted "Quiz 1" with responses:
+      | slot | response |
+      |   1  | True     |
+      |   2  | True     |
+      |   3  | True     |
+      |   4  | True     |
+    And user "student3" has attempted "Quiz 1" with responses:
+      | slot | response |
+      |   1  | True     |
+      |   2  | False    |
+      |   3  | False    |
+      |   4  | True     |
+    And user "student4" has attempted "Quiz 1" with responses:
+      | slot | response |
+      |   1  | False    |
+      |   2  | True     |
+      |   3  | True     |
+      |   4  | False    |
+
+  Scenario: View facility index in question bank
+    Given user "student1" has attempted "Quiz 2" with responses:
+      | slot | response |
+      |   1  | True    |
+      |   2  | True    |
+    And user "student2" has attempted "Quiz 2" with responses:
+      | slot | response |
+      |   1  | True     |
+      |   2  | True     |
+    When I am on the "Course 1" course page logged in as admin
+    And I navigate to "Question bank > Questions" in current page administration
+    And I should see "50.00%" in the "TF1" "table_row"
+    And I should see "75.00%" in the "TF2" "table_row"
+    And I should see "75.00%" in the "TF3" "table_row"
+    And I should see "50.00%" in the "TF4" "table_row"
+
+  Scenario: View discriminative efficiency in question bank
+    Given user "student1" has attempted "Quiz 2" with responses:
+      | slot | response |
+      |   1  | False    |
+      |   2  | False    |
+    And user "student2" has attempted "Quiz 2" with responses:
+      | slot | response |
+      |   1  | True     |
+      |   2  | True     |
+    When I am on the "Course 1" course page logged in as admin
+    And I navigate to "Question bank > Questions" in current page administration
+    And I should see "50.00%" in the "TF1" "table_row"
+    And I should see "75.00%" in the "TF2" "table_row"
+    And I should see "75.00%" in the "TF3" "table_row"
+    And I should see "50.00%" in the "TF4" "table_row"
+
+  Scenario: View discrimination index in question bank, good questions
+    Given user "student1" has attempted "Quiz 2" with responses:
+      | slot | response |
+      |   1  | False    |
+      |   2  | False    |
+    And user "student2" has attempted "Quiz 2" with responses:
+      | slot | response |
+      |   1  | True     |
+      |   2  | True     |
+    When I am on the "Course 1" course page logged in as admin
+    And I navigate to "Question bank > Questions" in current page administration
+    And I should see "likely" in the "TF1" "table_row"
+    And I should see "unlikely" in the "TF2" "table_row"
+    And I should see "unlikely" in the "TF3" "table_row"
+    And I should see "likely" in the "TF4" "table_row"
+    And I should see "likely" in the ".alert-warning" "css_element"
+    And I should see "unlikely" in the ".alert-success" "css_element"
+
+  Scenario: View discrimination index in question bank, bad questions
+    Given user "student1" has attempted "Quiz 2" with responses:
+      | slot | response |
+      |   1  | True     |
+      |   2  | True     |
+    And user "student2" has attempted "Quiz 2" with responses:
+      | slot | response |
+      |   1  | False    |
+      |   2  | True     |
+    And user "student3" has attempted "Quiz 2" with responses:
+      | slot | response |
+      |   1  | True     |
+      |   2  | False    |
+    When I am on the "Course 1" course page logged in as admin
+    And I navigate to "Question bank > Questions" in current page administration
+    And I should see "likely" in the "TF1" "table_row"
+    And I should see "very likely" in the "TF2" "table_row"
+    And I should see "very likely" in the "TF3" "table_row"
+    And I should see "likely" in the "TF4" "table_row"
+    And I should see "very likely" in the ".alert-danger" "css_element"
+    And I should see "likely" in the ".alert-warning" "css_element"
diff --git a/question/bank/statistics/tests/helper_test.php b/question/bank/statistics/tests/helper_test.php
new file mode 100644
index 00000000000..7dbe71a897f
--- /dev/null
+++ b/question/bank/statistics/tests/helper_test.php
@@ -0,0 +1,538 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace qbank_statistics;
+
+defined('MOODLE_INTERNAL') || die();
+
+global $CFG;
+require_once($CFG->dirroot . '/mod/quiz/locallib.php');
+use quiz;
+use question_engine;
+use quiz_attempt;
+/**
+ * Tests for question statistics.
+ *
+ * @package    qbank_statistics
+ * @copyright  2021 Catalyst IT Australia Pty Ltd
+ * @author     Nathan Nguyen <nathannguyen@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class helper_test extends \advanced_testcase {
+
+    /**
+     * Test quizzes that contain a specified question.
+     *
+     * @throws \coding_exception
+     * @throws \dml_exception
+     */
+    public function test_get_quizziess(): void {
+        global $DB;
+        $this->resetAfterTest();
+        $this->setAdminUser();
+        // Create a course.
+        $course = $this->getDataGenerator()->create_course();
+
+        // Create quizzes.
+        $quizgenerator = $this->getDataGenerator()->get_plugin_generator('mod_quiz');
+        $quiz1 = $quizgenerator->create_instance([
+            'course' => $course->id,
+            'grade' => 100.0, 'sumgrades' => 2,
+            'layout' => '1,2,0'
+        ]);
+        $quiz2 = $quizgenerator->create_instance([
+            'course' => $course->id,
+            'grade' => 100.0, 'sumgrades' => 2,
+            'layout' => '1,2,0'
+        ]);
+        $quiz3 = $quizgenerator->create_instance([
+            'course' => $course->id,
+            'grade' => 100.0, 'sumgrades' => 2,
+            'layout' => '1,2,0'
+        ]);
+        $this->assertEquals(3, $DB->count_records('quiz'));
+
+        // Create questions.
+        $questiongenerator = $this->getDataGenerator()->get_plugin_generator('core_question');
+        $cat = $questiongenerator->create_question_category();
+        $question1 = $questiongenerator->create_question('shortanswer', null, array('category' => $cat->id));
+        $question2 = $questiongenerator->create_question('numerical', null, array('category' => $cat->id));
+
+        // Add question 1 to quiz 1, 2.
+        quiz_add_quiz_question($question1->id, $quiz1);
+        quiz_add_quiz_question($question1->id, $quiz2);
+        // Quiz 1 attempt.
+        $attempt = ['answer' => 'frog', 'answer' => 10];
+        $this->submit_quiz($quiz1, $attempt);
+
+        // Add question 2 to quiz 2.
+        quiz_add_quiz_question($question2->id, $quiz2);
+        $this->submit_quiz($quiz2, $attempt);
+
+        // Checking quizzes that use question 1.
+        $question1quizzes = helper::get_quizzes($question1->id);
+        $this->assertCount(2, $question1quizzes);
+        $this->assertContains($quiz1->id, $question1quizzes);
+        $this->assertContains($quiz2->id, $question1quizzes);
+
+        // Checking quizzes that contain question 2.
+        $question2quizzes = helper::get_quizzes($question2->id);
+        $this->assertCount(1, $question2quizzes);
+        $this->assertContains($quiz2->id, $question2quizzes);
+
+        // Add random question to quiz3.
+        quiz_add_random_questions($quiz3, 0, $cat->id, 1, false);
+        $this->submit_quiz($quiz3, $attempt);
+        // Quiz 3 will be in one of these arrays.
+        $question1quizzes = helper::get_quizzes($question1->id);
+        $question2quizzes = helper::get_quizzes($question2->id);
+        $this->assertContains($quiz3->id, array_merge($question1quizzes, $question2quizzes));
+    }
+
+    /**
+     * Load facility for a question
+     *
+     * @param object $quiz quiz object
+     * @param int $questionid question id
+     * @return float|int
+     */
+    private function load_question_facility(object $quiz, int $questionid): ?float {
+        return helper::load_question_stats_item($quiz->id, $questionid, 'facility');
+    }
+
+    /**
+     * Load discriminative efficiency for a question
+     *
+     * @param object $quiz quiz object
+     * @param int $questionid question id
+     * @return float|int
+     */
+    private function load_question_discriminative_efficiency(object $quiz, int $questionid): ?float {
+        return helper::load_question_stats_item($quiz->id, $questionid, 'discriminativeefficiency');
+    }
+
+    /**
+     * Load discrimination index for a question
+     *
+     * @param object $quiz quiz object
+     * @param int $questionid question id
+     * @return float|int
+     */
+    private function load_question_discrimination_index(object $quiz, int $questionid): ?float {
+        return helper::load_question_stats_item($quiz->id, $questionid, 'discriminationindex');
+    }
+
+    /**
+     * Create 2 quizzes.
+     *
+     * @return array return 2 quizzes
+     * @throws \coding_exception
+     */
+    private function prepare_quizzes(): array {
+        // Create a course.
+        $course = $this->getDataGenerator()->create_course();
+
+        // Make 2 quizzes.
+        $quizgenerator = $this->getDataGenerator()->get_plugin_generator('mod_quiz');
+        $layout = '1,2,0,3,4,0';
+        $quiz1 = $quizgenerator->create_instance([
+            'course' => $course->id,
+            'grade' => 100.0, 'sumgrades' => 2,
+            'layout' => $layout
+        ]);
+
+        $quiz2 = $quizgenerator->create_instance([
+            'course' => $course->id,
+            'grade' => 100.0, 'sumgrades' => 2,
+            'layout' => $layout
+        ]);
+
+        $questiongenerator = $this->getDataGenerator()->get_plugin_generator('core_question');
+        $cat = $questiongenerator->create_question_category();
+
+        $page = 1;
+        $questions = [];
+        foreach (explode(',', $layout) as $slot) {
+            if ($slot == 0) {
+                $page += 1;
+                continue;
+            }
+
+            $question = $questiongenerator->create_question('shortanswer', null, ['category' => $cat->id]);
+            $questions[$slot] = $question;
+            quiz_add_quiz_question($question->id, $quiz1, $page);
+            quiz_add_quiz_question($question->id, $quiz2, $page);
+        }
+
+        return [$quiz1, $quiz2, $questions];
+    }
+
+    /**
+     * Submit quiz answers
+     *
+     * @param object $quiz
+     * @param array $answers
+     * @throws \moodle_exception
+     */
+    private function submit_quiz(object $quiz, array $answers): void {
+        // Create user.
+        $user = $this->getDataGenerator()->create_user();
+        // Create attempt.
+        $quizobj = quiz::create($quiz->id, $user->id);
+        $quba = question_engine::make_questions_usage_by_activity('mod_quiz', $quizobj->get_context());
+        $quba->set_preferred_behaviour($quizobj->get_quiz()->preferredbehaviour);
+        $timenow = time();
+        $attempt = quiz_create_attempt($quizobj, 1, false, $timenow, false, $user->id);
+        quiz_start_new_attempt($quizobj, $quba, $attempt, 1, $timenow);
+        quiz_attempt_save_started($quizobj, $quba, $attempt);
+        // Submit attempt.
+        $attemptobj = quiz_attempt::create($attempt->id);
+        $attemptobj->process_submitted_actions($timenow, false, $answers);
+        $attemptobj->process_finish($timenow, false);
+    }
+
+    /**
+     * Generate attempt answers.
+     *
+     * @param array $correctanswerflags array of 1 or 0
+     * 1 : generate correct answer
+     * 0 : generate wrong answer
+     *
+     * @return array
+     */
+    private function generate_attempt_answers(array $correctanswerflags): array {
+        $attempt = [];
+        for ($i = 1; $i <= 4; $i++) {
+            if (isset($correctanswerflags) && $correctanswerflags[$i - 1] == 1) {
+                // Correct answer.
+                $attempt[$i] = ['answer' => 'frog'];
+            } else {
+                $attempt[$i] = ['answer' => 'false'];
+            }
+        }
+        return $attempt;
+    }
+
+    /**
+     *
+     * Generate quizzes and submit answers.
+     *
+     * @param array $quiz1attempts quiz 1 attempts
+     * @param array $quiz2attempts quiz 2 attempts
+     *
+     * @return array
+     */
+    private function prepare_and_submit_quizzes(array $quiz1attempts, array $quiz2attempts): array {
+        list($quiz1, $quiz2, $questions) = $this->prepare_quizzes();
+        // Submit attempts of quiz1.
+        foreach ($quiz1attempts as $attempt) {
+            $this->submit_quiz($quiz1, $attempt);
+        }
+        // Submit attempts of quiz2.
+        foreach ($quiz2attempts as $attempt) {
+            $this->submit_quiz($quiz2, $attempt);
+        }
+        return [$quiz1, $quiz2, $questions];
+    }
+
+    /**
+     * Data provider for {@see test_load_question_facility()}.
+     *
+     * @return \Generator
+     */
+    public function load_question_facility_provider(): \Generator {
+        yield 'Facility case 1' => [
+            'Quiz 1 attempts' => [
+                $this->generate_attempt_answers([1, 0, 0, 0]),
+            ],
+            'Expected quiz 1 facilities' => ['100.00%', '0.00%', '0.00%', '0.00%'],
+            'Quiz 2 attempts' => [
+                $this->generate_attempt_answers([1, 0, 0, 0]),
+                $this->generate_attempt_answers([1, 1, 0, 0]),
+            ],
+            'Expected quiz 2 facilities' => ['100.00%', '50.00%', '0.00%', '0.00%'],
+            'Expected average facilities' => ['100.00%', '25.00%', '0.00%', '0.00%'],
+        ];
+        yield 'Facility case 2' => [
+            'Quiz 1 attempts' => [
+                $this->generate_attempt_answers([1, 0, 0, 0]),
+                $this->generate_attempt_answers([1, 1, 0, 0]),
+                $this->generate_attempt_answers([1, 1, 1, 0]),
+            ],
+            'Expected quiz 1 facilities' => ['100.00%', '66.67%', '33.33%', '0.00%'],
+            'Quiz 2 attempts' => [
+                $this->generate_attempt_answers([1, 0, 0, 0]),
+                $this->generate_attempt_answers([1, 1, 0, 0]),
+                $this->generate_attempt_answers([1, 1, 1, 0]),
+                $this->generate_attempt_answers([1, 1, 1, 1]),
+            ],
+            'Expected quiz 2 facilities' => ['100.00%', '75.00%', '50.00%', '25.00%'],
+            'Expected average facilities' => ['100.00%', '70.83%', '41.67%', '12.50%'],
+        ];
+    }
+
+    /**
+     * Test question facility
+     *
+     * @dataProvider load_question_facility_provider
+     *
+     * @param array $quiz1attempts quiz 1 attempts
+     * @param array $expectedquiz1facilities expected quiz 1 facilities
+     * @param array $quiz2attempts quiz 2 attempts
+     * @param array $expectedquiz2facilities  expected quiz 2 facilities
+     * @param array $expectedaveragefacilities expected average facilities
+     */
+    public function test_load_question_facility(array $quiz1attempts, array $expectedquiz1facilities,
+                                                array $quiz2attempts, array $expectedquiz2facilities,
+                                                array $expectedaveragefacilities): void {
+        $this->resetAfterTest();
+
+        list($quiz1, $quiz2, $questions) = $this->prepare_and_submit_quizzes($quiz1attempts, $quiz2attempts);
+
+        // Quiz 1 facilities.
+        $quiz1facility1 = $this->load_question_facility($quiz1, $questions[1]->id);
+        $quiz1facility2 = $this->load_question_facility($quiz1, $questions[2]->id);
+        $quiz1facility3 = $this->load_question_facility($quiz1, $questions[3]->id);
+        $quiz1facility4 = $this->load_question_facility($quiz1, $questions[4]->id);
+
+        $this->assertEquals($expectedquiz1facilities[0], helper::format_percentage($quiz1facility1));
+        $this->assertEquals($expectedquiz1facilities[1], helper::format_percentage($quiz1facility2));
+        $this->assertEquals($expectedquiz1facilities[2], helper::format_percentage($quiz1facility3));
+        $this->assertEquals($expectedquiz1facilities[3], helper::format_percentage($quiz1facility4));
+
+        // Quiz 2 facilities.
+        $quiz2facility1 = $this->load_question_facility($quiz2, $questions[1]->id);
+        $quiz2facility2 = $this->load_question_facility($quiz2, $questions[2]->id);
+        $quiz2facility3 = $this->load_question_facility($quiz2, $questions[3]->id);
+        $quiz2facility4 = $this->load_question_facility($quiz2, $questions[4]->id);
+
+        $this->assertEquals($expectedquiz2facilities[0], helper::format_percentage($quiz2facility1));
+        $this->assertEquals($expectedquiz2facilities[1], helper::format_percentage($quiz2facility2));
+        $this->assertEquals($expectedquiz2facilities[2], helper::format_percentage($quiz2facility3));
+        $this->assertEquals($expectedquiz2facilities[3], helper::format_percentage($quiz2facility4));
+
+        // Average question facilities.
+        $averagefacility1 = helper::calculate_average_question_facility($questions[1]->id);
+        $averagefacility2 = helper::calculate_average_question_facility($questions[2]->id);
+        $averagefacility3 = helper::calculate_average_question_facility($questions[3]->id);
+        $averagefacility4 = helper::calculate_average_question_facility($questions[4]->id);
+
+        $this->assertEquals($expectedaveragefacilities[0], helper::format_percentage($averagefacility1));
+        $this->assertEquals($expectedaveragefacilities[1], helper::format_percentage($averagefacility2));
+        $this->assertEquals($expectedaveragefacilities[2], helper::format_percentage($averagefacility3));
+        $this->assertEquals($expectedaveragefacilities[3], helper::format_percentage($averagefacility4));
+    }
+
+    /**
+     * Data provider for {@see test_load_question_discriminative_efficiency()}.
+     * @return \Generator
+     */
+    public function load_question_discriminative_efficiency_provider() {
+        yield 'Discriminative efficiency' => [
+            'Quiz 1 attempts' => [
+                $this->generate_attempt_answers([1, 0, 0, 0]),
+                $this->generate_attempt_answers([1, 1, 0, 0]),
+                $this->generate_attempt_answers([1, 0, 1, 0]),
+                $this->generate_attempt_answers([1, 1, 1, 1]),
+            ],
+            'Expected quiz 1 discriminative efficiency' => ['N/A', '33.33%', '33.33%', '100.00%'],
+            'Quiz 2 attempts' => [
+                $this->generate_attempt_answers([1, 1, 1, 1]),
+                $this->generate_attempt_answers([0, 0, 0, 0]),
+                $this->generate_attempt_answers([1, 0, 0, 1]),
+                $this->generate_attempt_answers([0, 1, 1, 0]),
+            ],
+            'Expected quiz 2 discriminative efficiency' => ['50.00%', '50.00%', '50.00%', '50.00%'],
+            'Expected average discriminative efficiency' => ['50.00%', '41.67%', '41.67%', '75.00%'],
+        ];
+    }
+
+    /**
+     * Test discriminative efficiency
+     *
+     * @dataProvider load_question_discriminative_efficiency_provider
+     *
+     * @param array $quiz1attempts quiz 1 attempts
+     * @param array $expectedquiz1discriminativeefficiency expected quiz 1 discriminative efficiency
+     * @param array $quiz2attempts quiz 2 attempts
+     * @param array $expectedquiz2discriminativeefficiency expected quiz 2 discriminative efficiency
+     * @param array $expectedaveragediscriminativeefficiency expected average discriminative efficiency
+     */
+    public function test_load_question_discriminative_efficiency(array $quiz1attempts, array $expectedquiz1discriminativeefficiency,
+                                                                 array $quiz2attempts, array $expectedquiz2discriminativeefficiency,
+                                                                 array $expectedaveragediscriminativeefficiency): void {
+        $this->resetAfterTest();
+
+        list($quiz1, $quiz2, $questions) = $this->prepare_and_submit_quizzes($quiz1attempts, $quiz2attempts);
+
+        // Quiz 1 discriminative efficiency.
+        $discriminativeefficiency1 = $this->load_question_discriminative_efficiency($quiz1, $questions[1]->id);
+        $discriminativeefficiency2 = $this->load_question_discriminative_efficiency($quiz1, $questions[2]->id);
+        $discriminativeefficiency3 = $this->load_question_discriminative_efficiency($quiz1, $questions[3]->id);
+        $discriminativeefficiency4 = $this->load_question_discriminative_efficiency($quiz1, $questions[4]->id);
+
+        $this->assertEquals($expectedquiz1discriminativeefficiency[0],
+            helper::format_percentage($discriminativeefficiency1, false),
+            "Failure in quiz 1 - question 1 discriminative efficiency");
+        $this->assertEquals($expectedquiz1discriminativeefficiency[1],
+            helper::format_percentage($discriminativeefficiency2, false),
+            "Failure in quiz 1 - question 2 discriminative efficiency");
+        $this->assertEquals($expectedquiz1discriminativeefficiency[2],
+            helper::format_percentage($discriminativeefficiency3, false),
+            "Failure in quiz 1 - question 3 discriminative efficiency");
+        $this->assertEquals($expectedquiz1discriminativeefficiency[3],
+            helper::format_percentage($discriminativeefficiency4, false),
+            "Failure in quiz 1 - question 4 discriminative efficiency");
+
+        // Quiz 2 discriminative efficiency.
+        $discriminativeefficiency1 = $this->load_question_discriminative_efficiency($quiz2, $questions[1]->id);
+        $discriminativeefficiency2 = $this->load_question_discriminative_efficiency($quiz2, $questions[2]->id);
+        $discriminativeefficiency3 = $this->load_question_discriminative_efficiency($quiz2, $questions[3]->id);
+        $discriminativeefficiency4 = $this->load_question_discriminative_efficiency($quiz2, $questions[4]->id);
+
+        $this->assertEquals($expectedquiz2discriminativeefficiency[0],
+            helper::format_percentage($discriminativeefficiency1, false),
+            "Failure in quiz 2 - question 1 discriminative efficiency");
+        $this->assertEquals($expectedquiz2discriminativeefficiency[1],
+            helper::format_percentage($discriminativeefficiency2, false),
+            "Failure in quiz 2 - question 2 discriminative efficiency");
+        $this->assertEquals($expectedquiz2discriminativeefficiency[2],
+            helper::format_percentage($discriminativeefficiency3, false),
+            "Failure in quiz 2 - question 3 discriminative efficiency");
+        $this->assertEquals($expectedquiz2discriminativeefficiency[3],
+            helper::format_percentage($discriminativeefficiency4, false),
+            "Failure in quiz 2 - question 4 discriminative efficiency");
+
+        // Average question discriminative efficiency.
+        $avgdiscriminativeefficiency1 = helper::calculate_average_question_discriminative_efficiency($questions[1]->id);
+        $avgdiscriminativeefficiency2 = helper::calculate_average_question_discriminative_efficiency($questions[2]->id);
+        $avgdiscriminativeefficiency3 = helper::calculate_average_question_discriminative_efficiency($questions[3]->id);
+        $avgdiscriminativeefficiency4 = helper::calculate_average_question_discriminative_efficiency($questions[4]->id);
+
+        $this->assertEquals($expectedaveragediscriminativeefficiency[0],
+            helper::format_percentage($avgdiscriminativeefficiency1, false),
+            "Failure in question 1 average discriminative efficiency");
+        $this->assertEquals($expectedaveragediscriminativeefficiency[1],
+            helper::format_percentage($avgdiscriminativeefficiency2, false),
+            "Failure in question 2 average discriminative efficiency");
+        $this->assertEquals($expectedaveragediscriminativeefficiency[2],
+            helper::format_percentage($avgdiscriminativeefficiency3, false),
+            "Failure in question 3 average discriminative efficiency");
+        $this->assertEquals($expectedaveragediscriminativeefficiency[3],
+            helper::format_percentage($avgdiscriminativeefficiency4, false),
+            "Failure in question 4 average discriminative efficiency");
+    }
+
+    /**
+     * Data provider for {@see test_load_question_discrimination_index()}.
+     * @return \Generator
+     */
+    public function load_question_discrimination_index_provider() {
+        yield 'Discrimination Index' => [
+            'Quiz 1 attempts' => [
+                $this->generate_attempt_answers([1, 0, 0, 0]),
+                $this->generate_attempt_answers([1, 1, 0, 0]),
+                $this->generate_attempt_answers([1, 0, 1, 0]),
+                $this->generate_attempt_answers([1, 1, 1, 1]),
+            ],
+            'Expected quiz 1 Discrimination Index' => ['N/A', '30.15%', '30.15%', '81.65%'],
+            'Quiz 2 attempts' => [
+                $this->generate_attempt_answers([1, 1, 1, 1]),
+                $this->generate_attempt_answers([0, 0, 0, 0]),
+                $this->generate_attempt_answers([1, 0, 0, 1]),
+                $this->generate_attempt_answers([0, 1, 1, 0]),
+            ],
+            'Expected quiz 2 discrimination Index' => ['44.72%', '44.72%', '44.72%', '44.72%'],
+            'Expected average discrimination Index' => ['44.72%', '37.44%', '37.44%', '63.19%'],
+        ];
+    }
+
+    /**
+     * Test discrimination index
+     *
+     * @dataProvider load_question_discrimination_index_provider
+     *
+     * @param array $quiz1attempts quiz 1 attempts
+     * @param array $expectedquiz1discriminationindex expected quiz 1 discrimination index
+     * @param array $quiz2attempts quiz 2 attempts
+     * @param array $expectedquiz2discriminationindex expected quiz 2 discrimination index
+     * @param array $expectedaveragediscriminationindex expected average discrimination index
+     */
+    public function test_load_question_discrimination_index(array $quiz1attempts, array $expectedquiz1discriminationindex,
+                                                            array $quiz2attempts, array $expectedquiz2discriminationindex,
+                                                            array $expectedaveragediscriminationindex): void {
+        $this->resetAfterTest();
+
+        list($quiz1, $quiz2, $questions) = $this->prepare_and_submit_quizzes($quiz1attempts, $quiz2attempts);
+
+        // Quiz 1 discrimination index.
+        $discriminationindex1 = $this->load_question_discrimination_index($quiz1, $questions[1]->id);
+        $discriminationindex2 = $this->load_question_discrimination_index($quiz1, $questions[2]->id);
+        $discriminationindex3 = $this->load_question_discrimination_index($quiz1, $questions[3]->id);
+        $discriminationindex4 = $this->load_question_discrimination_index($quiz1, $questions[4]->id);
+
+        $this->assertEquals($expectedquiz1discriminationindex[0],
+            helper::format_percentage($discriminationindex1, false),
+            "Failure in quiz 1 - question 1 discrimination index");
+        $this->assertEquals($expectedquiz1discriminationindex[1],
+            helper::format_percentage($discriminationindex2, false),
+            "Failure in quiz 1 - question 2 discrimination index");
+        $this->assertEquals($expectedquiz1discriminationindex[2],
+            helper::format_percentage($discriminationindex3, false),
+            "Failure in quiz 1 - question 3 discrimination index");
+        $this->assertEquals($expectedquiz1discriminationindex[3],
+            helper::format_percentage($discriminationindex4, false),
+            "Failure in quiz 1 - question 4 discrimination index");
+
+        // Quiz 2 discrimination index.
+        $discriminationindex1 = $this->load_question_discrimination_index($quiz2, $questions[1]->id);
+        $discriminationindex2 = $this->load_question_discrimination_index($quiz2, $questions[2]->id);
+        $discriminationindex3 = $this->load_question_discrimination_index($quiz2, $questions[3]->id);
+        $discriminationindex4 = $this->load_question_discrimination_index($quiz2, $questions[4]->id);
+
+        $this->assertEquals($expectedquiz2discriminationindex[0],
+            helper::format_percentage($discriminationindex1, false),
+            "Failure in quiz 2 - question 1 discrimination index");
+        $this->assertEquals($expectedquiz2discriminationindex[1],
+            helper::format_percentage($discriminationindex2, false),
+            "Failure in quiz 2 - question 2 discrimination index");
+        $this->assertEquals($expectedquiz2discriminationindex[2],
+            helper::format_percentage($discriminationindex3, false),
+            "Failure in quiz 2 - question 3 discrimination index");
+        $this->assertEquals($expectedquiz2discriminationindex[3],
+            helper::format_percentage($discriminationindex4, false),
+            "Failure in quiz 2 - question 4 discrimination index");
+
+        // Average question discrimination index.
+        $avgdiscriminationindex1 = helper::calculate_average_question_discrimination_index($questions[1]->id);
+        $avgdiscriminationindex2 = helper::calculate_average_question_discrimination_index($questions[2]->id);
+        $avgdiscriminationindex3 = helper::calculate_average_question_discrimination_index($questions[3]->id);
+        $avgdiscriminationindex4 = helper::calculate_average_question_discrimination_index($questions[4]->id);
+
+        $this->assertEquals($expectedaveragediscriminationindex[0],
+            helper::format_percentage($avgdiscriminationindex1, false),
+            "Failure in question 1 average discrimination index");
+        $this->assertEquals($expectedaveragediscriminationindex[1],
+            helper::format_percentage($avgdiscriminationindex2, false),
+            "Failure in question 2 average discrimination index");
+        $this->assertEquals($expectedaveragediscriminationindex[2],
+            helper::format_percentage($avgdiscriminationindex3, false),
+            "Failure in question 3 average discrimination index");
+        $this->assertEquals($expectedaveragediscriminationindex[3],
+            helper::format_percentage($avgdiscriminationindex4, false),
+            "Failure in question 4 average discrimination index");
+    }
+}
diff --git a/question/bank/statistics/version.php b/question/bank/statistics/version.php
new file mode 100644
index 00000000000..eee106f59e0
--- /dev/null
+++ b/question/bank/statistics/version.php
@@ -0,0 +1,31 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Question statistics
+ *
+ * @package    qbank_statistics
+ * @copyright  2021 Catalyst IT Australia Pty Ltd
+ * @author     Nathan Nguyen <nathannguyen@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+$plugin->component = 'qbank_statistics';
+$plugin->version   = 2021092000;
+$plugin->requires  = 2021052500;
+$plugin->maturity  = MATURITY_STABLE;