Power and Sample Size Calculation - Purdue University

If a contrast that compares men and women were of interest, this step could read: contrast= (1 1 -1 -1). ntotal =. - Specifies that the total sample size is what needs to be calculated. This could be given and the power for that particular sample size could be calculated instead. power =0.8 - Step where the desired power is specified. ................
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