12-16-2015 04:27 PM
I am trying to compare means of two groups. The sample size for each group is small (between 9 and 15) and the sample size for each group is not the same. I have been using proc ttest and looking at the satterthwaite correction p value. The variances are equal (normality is a little off), but I read somewhere that satterthwaite corrects for both variance issues as well as unequal sample sizes. I have also been using proc npar1way and looking at the Wilcoxon results, which I think weights by sample size as the default. Am I on the right track? Any advice is appreciated. Thanks.