Moodle collects data on all learners' activities, which is discussed in Chapter 14. Within the Quiz module, data is collected on individual learners, including results for individual responses and itemized analysis for each question.
On the Editing Quiz page (refer to Figure 11-25), click the Results tab. This action opens the Overview quiz reports page, shown in Figure 11-26. There are four links right under the tabs: Overview, Regrade, Manual Grading, and Item Analysis.
At the bottom of the list, Moodle provides the overall average score as well as Select All and Deselect All links, which select all the attempts on the quiz or deselect the selections. (See Figure 11-27.) To remove the attempts whether they're all selected or just individual selections, click the Delete Selected Attempts button.