Hi, I'm working on a homework assignment for a statistics class and I'm tasked with finding whether the data set violated the assumption of homogeneity of covariance for a repeated measures split plot setup. I'm using JMP Pro because it's free through my university, however, the lesson material is structured for using SPSS (which is highly not free). I've been searching high and low for how to do Box's M test in JMP and so far only found one post suggesting that it's not possible. Is it possible, and if so, how would I go about running it? Thanks!