MDL-17190 "error in code for calculating discrimination index and eff…

…iciency for randomly selected questions" Fixed the code for item stats.
moodle · Nov 10, 2008 · 664bf34 · 664bf34
1 parent 7468604
commit 664bf34
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/mod/quiz/report/statistics/qstats.php b/mod/quiz/report/statistics/qstats.php
@@ -79,7 +79,11 @@ function _initial_states_walker($state, &$stats, $positionstat = true){
 
     function _secondary_states_walker($state, &$stats){
         $gradedifference = ($state->grade - $stats->gradeaverage);
-        $othergradedifference = (($state->sumgrades - $state->grade) - $stats->othergradeaverage);
+        if ($stats->subquestion){
+            $othergradedifference = $state->sumgrades - $stats->othergradeaverage;
+        } else {
+            $othergradedifference = (($state->sumgrades - $state->grade) - $stats->othergradeaverage);
+        }
         $overallgradedifference = $state->sumgrades - $this->sumgradesavg;
         $sortedgradedifference = (array_shift($stats->gradearray) - $stats->gradeaverage);
         $sortedothergradedifference = (array_shift($stats->othergradesarray) - $stats->othergradeaverage);