Question
I have included the compromise but am struggling with the part that is highlighted and bolded. Assume that the result is a sample size beyond
I have included the compromise but am struggling with the part that is highlighted and bolded.
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 approximately half the size. Give your rationale for your selected beta/alpha ratio. Indicate the resulting alpha and beta. Give an argument that your study is worth doing with the smaller sample.
t tests - Correlation: Point biserial model
Analysis: Compromise: Compute implied & power
Input: Tail(s) = One
Effect size || = 0.1
/ ratio = 1
Total sample size = 33
Output: Noncentrality parameter = 0.5773503
Critical t = 0.2910132
Df = 31
err prob = 0.3864897
err prob = 0.3864897
Power (1- err prob) = 0.6135103
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