What I have is a cross section of a bone divided in 60 equal slices. These 60 slices form 4 groups of 15 slices each corresponding to the 4 anatomical orientations (anterior, lateral, posterior and medial). I measured bone compactness for each of these 60 slices. Bone compactness corresponds to the quantity of bone in a slice and varies between 0 and 1.
I would like to compare the mean bone compactness between these four groups. I first thought of doing a one-way ANOVA, but I realized that my measurements of compactness are interdependent and therefore prevent me from doing so. I looked at the repeated measures ANOVA but for me it does not suit my question.