How can I use proc power to calculate the sample size needed for the following
scenario:
2 independent groups 1:2 randomization
2-sided 95% confidence interval lower bound of the mean difference must exceed +2,SD=3.1
hel
How can I specify the lower bound in the SAS code?
Thanks!
I think you can refer the documentation about this procedure, there is an option to define the ratio.
thank you, Jack2012, but there is no ratio in my example. I specifically need an example with a confidence interval around a mean difference.
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