sample size calculator for rct

If you are a clinical researcher trying to determine how many subjects to include in your study or you have another question related to sample size or power calculations, we developed this website for you. Our approach is based on Chapters 5 and 6 in the

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    https://www.ncbi.nlm.nih.gov
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    https://www.stat.ubc.ca
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    https://stats.stackexchange.co
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    https://academic.oup.com
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    http://home.clara.net
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    http://cntrics.ucdavis.edu