Item Analysis needs to be included for Canvas Quiz Surveys (both graded and ungraded), just like it is for Graded Quizzes. On the Statistics page, the Item Analysis button is currently greyed out (see attached), even though the same data is reflected in the Question Breakdown on the same page.
A couple of examples of why these aggregate statistics would be useful are:
Compiling survey data from a mid- or end-of-course survey
Giving credit (with a Graded Survey) for the completion of a survey that you want to record the aggregate survey data
I understand that Canvas is phasing out the old Quiz tool, so this is a perfect opportunity to add this functionality to the new Quiz tool.