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Calculate the sample size needed given these factors

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Reference no: EM13258167

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. 

Reference no: EM13258167

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