# 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](https://tracker.moodle.org/browse/MDL-87425)