Looking to determine sample sizes for both my experimental and control
groups (I want only a small portion of my participants in my experimental
condition) in order to compare population means. I would be able to
estimate standard deviation beforehand.

I'm using the bpower function from the Hmisc R package, specifically
bsamsize to compare population proportions, but was wondering if there was
an equivalent function for comparing means.

-- 
Rebecca Greenblatt

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