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MDL-14204 "Content for Quiz Statistics report table - Random_guess_score" added method random_guess_score to question type objects and a new function in questionlib that calls the question type method.

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jamiesensei 2008-06-16 13:29:00 +00:00
parent ed48af75b4
commit 6f51ed72be
12 changed files with 201 additions and 96 deletions
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15
question/type/randomsamatch/questiontype.php
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@ -272,7 +272,20 @@ class question_randomsamatch_qtype extends question_match_qtype {
$result->responses = $answers;
return $result;
}
/**
* @param object $question
* @return integer a score out of 1 that the average random guess by a
* student might give.
*/
function get_random_guess_score($question) {
//Effectively $subquestions multi choice questions with equal weighting
//assuming a student has the intelligence to not select the same answer twice
//there is in each subquestion factorial($subquestions-1) chance of getting
//the answer right. There are factorial($subquestions) possible combinations of
//answers and it works out to an average grade of 1/$subquestions.
$subquestions = count($question->options->subquestions);
return 1/$subquestions;
}
/// BACKUP FUNCTIONS ////////////////////////////
/*