A repeated-measures t-test provides the following data: Mean of sample at first timepoint is 8.90, mean of sample at second timepoint is 11.68; estimated variance of the difference scores is 31.88 What is the Cohen’s d for this study?
Added by Christian G.
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This is done by subtracting the mean of the first timepoint from the mean of the second timepoint. Mean difference = 11.68 - 8.90 = 2.78 Show more…
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