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  1. Moodle
  2. MDL-66641

Discriminative efficiency is multiplied by 100 two times in the quiz statistics report

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: Minor Minor
    • 3.6.7, 3.7.3
    • 3.6.6, 3.7, 3.8
    • Quiz
    • MOODLE_36_STABLE, MOODLE_37_STABLE, MOODLE_38_STABLE
    • MOODLE_36_STABLE, MOODLE_37_STABLE
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      1. Create a quiz containing two true-false questions.
      2. Attempt the quiz as three different students, the first two students should get both questions right, the third should get both questions wrong.
      3. As teacher/admin, got to Quiz settings -> Results -> statistics
      4. Verify that the values in the Discriminative efficiency column are 100% (not 10000%).

      Alternatively: Go to https://qa.moodle.net/mod/quiz/report.php?id=34&mode=statistics, and verift that the values in the Discriminative efficiency column are (-)100% (not 10000%) if you want to avoid the setup.

      Show
      Create a quiz containing two true-false questions. Attempt the quiz as three different students, the first two students should get both questions right, the third should get both questions wrong. As teacher/admin, got to Quiz settings -> Results -> statistics Verify that the values in the Discriminative efficiency column are 100% (not 10000%). Alternatively: Go to https://qa.moodle.net/mod/quiz/report.php?id=34&mode=statistics , and verift that the values in the Discriminative efficiency column are (-)100% (not 10000%) if you want to avoid the setup.

      In /mod/quiz/report/statistics/statistics_table.php in function col_discriminative_efficiency discriminative efficiency is multiplied by 100 second time in function format_percentage.

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            timhunt Tim Hunt
            иванскляров Иван Скляров
            Shamim Rezaie Shamim Rezaie
            Eloy Lafuente (stronk7) Eloy Lafuente (stronk7)
            Janelle Barcega Janelle Barcega
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