I'm trying to find out if differences in the variation of student performance among different class sections (i.e., students enroll in the same class but have different sections) are statistically significant.
I got the values by grouping each student into their class section, then calculating the standard deviation for each of those sections. Now that I have a list of standard deviations for each sections (around 900) what test should I use to see if the difference among them are statistically significant?
Clarification: I use the term class and section in the context of education. Each student can only be enrolled in one section of the class (e.g., Math 101 section 01).