Quick and Simple Approximation of Sample Sizes for Comparing Two Independent Binomial Distributions: Different-Sample-Size Case

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Abstract
Given the ratio, k, of two sample sizes, sample sizes for comparing two independent proportions can be approximated from the sample size for the equal-sample-size design. The proposed method is compared to the method of Fleiss , Tytun and Ury (1980, Biometrics 36, 343-346). Methods for choosing the ratio are also presented.

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