qbank_statistics Upgrade notes

5.2

Removed

• • The following methods have been removed from public/question/bank/statistics/classes/helper.php:
    • \qbank_statistics\helper::calculate_average_question_facility()
    • \qbank_statistics\helper::calculate_average_question_discriminative_efficiency()
    • \qbank_statistics\helper::calculate_average_question_discrimination_index()

  For more information see MDL-87425