Left -tailed or two-tailed test
Use the Mann-Whitney Table to find the critical values. For a left -tailed or two-tailed test, you will also
need the relation M1-A = n1(n1 + n2 + 1) - MA.
n1 = 8, n2 = 4, significance level = 0.01, two-tailed test
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One concern in the evaluation of research results is that the subjects in one treatment condition may be substantially different (older, smarter, and so on) than the subjects in another condition. However, this is not a problem with a repeated-mea
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