Hello, 

I'm having some issues grouping cases for some Mann-Whitney U tests I'm attempting to run. I'm willing to use wilcox.test if it'll work; I've also tried wilcox_test() from the "coin" package. Here's the deal: for each column (A through H), I would like to run the two-sample independent test, comparing Group 5 (CD8.14 through CD8.17) to Group 6 (CD8.18 through CD8.21). So, for A, test Group 5 agains Group 6, for B, test Group 5 against Group 6, and so on. I'm sure this is basic, but thank you in advance for any help you can provide.

 All the best, 
David



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