Sample Size Planning, Calculation, and Justification
Sample size increases as SD increases (holding the di erence in the mean values constant). Also have standardized e ect size = e ectsize SD. Sample size decreases as standardized e ect size increases. Theresa A Scott, MS (Vandy Biostatistics) Sample Size 13 / 24 Calculating sample size for analytic studies, cont’d.Example using the t-test: ................
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