Dear all,
I have a basic question concerning the two-sample t-test analysis where I have 20 subjects in group1 and 10 in group 2: is it correct to specify the contrasts 1 -1 and -1 1 or should the contrast be corrected for the uneven group size (n1/(n1+n2) -n2/(n1+n2))?
Thank you very much!
Olga
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