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Sample Size Determination and Power Analysis Using G*Power

A solved assignment explaining how to determine sample size and conduct power analysis using GPower.

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    Sample Size Determination and Power Analysis Using G*Power 1. Calculate the sample size needed given these factors: one - tailed t - test with two independent groups of equal size small effect size (see Piasta, S.B., & Justice, L.M., 2010) alpha =.05 beta = .2 Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample half the size. Indicate the resulting alpha and beta. Present an argument that your study is worth doing with the smaller sample.

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