I am trying to do a basic Ttest. There 6 groups based on gender, race and ethnicity. I want to run a simple ttest between group 1 and 5, but I am not sure the best way to do it. From my understanding the group variable can only take two values, and I have seen people ignoring a group based on if commands, but I have 6 groups. I don't want to have to create a new pairwise variable based on each two combinations.
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