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A proportion is the fraction of some total that is of a particular kind, either (i) as a count of one type of thing out of a total count, or (ii) as a component of a continuous variable.
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Estimating sample size required from previous study
I believe the article below accurately answers the problem:
https://www.bmj.com/content/bmj/306/6886/1181.full.pdf
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Estimating sample size required from previous study
Suppose I have a two phase experiment. The goal of the experiment will be to test if there are differences in proportions between two treatments. In phase one, I have no idea how many samples I will …