Hi everyone, I want to do two sample ttest with standard error cluster. I googled that proc mixed would work, but I understand that it also has fixed effect. But I don't want fixed effect, I only want error cluster. My data looks like this fundid date var1 group group is dummy variable. I want to cluster at fund lever, that is fundid my code is proc mixed; class fundid group; model var1=group; random fundid; ismeans group/diff; run; Can you let me know whether it's correct? do I have fixed effect included in the test? Thank!
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