We wish to detect a mean difference of 025 for a variable
We wish to detect a mean difference of 0.25 for a variable that has a standard deviation of 0.67. How large a sample is needed to detect the mean differences with 90% power at α = 0.05 (two-sided)?
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we wish to detect a mean difference of 025 for a variable that has a standard deviation of 067 how large a sample is
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