I answered these homework questions but I was told that at least one of my answers is wrong. However, I can't tell which one I answered wrong. What incorrect assumptions have I made?
3a) Welch's T-test would be most appropriate since we have normal data with unequal variances.
3b) A Wilcoxon-Mann Whitney U Test appears to be the best option since transformations have failed and we must now use a non-parametric test for these 2 independent samples.
3c) The data has unequal variances and is not normal so we should also use a Wilcoxon-Mann Whitney U Test here too.