Permutation test
Dear reader, I'm looking at the correlation between peripheral metabolism (Insulin, glucose, HbA1c) and brain metabolites (NAA, Cho, mI) in T2DM and control group. I choose spearmans rho because there was no normal distrbution. Now i'm intressted in looking if there is a difference between the correlation. So for example is there a difference in the correlation insulin-NAA in T2DM compared to t...