Are you able to see the quiz statistics when all of the student enrollments in a course are concluded? I have been looking and it does not appear so. When there is at least one active student in the course when you go to the quiz details this appears:

When I go to a course where all of the students have concluded enrollments, I do not see the option for quiz statistics rather it looks like this:

Is there a work around I do not know of to find the quiz statistics option? I do not like having to temporarily restore an enrollment just so you can look at those statistics.