摘要: This article summarizes the most commonly used statistical techniques for analyzing two by frequency tables. It presents methods estimation of measures association (risk ratios, risk differences, odds ratios) and agreement (kappa). Tests hypotheses are described large samples (based on asymptotic theory) small (exact tests). Both conditional (Fisher's exact test) unconditional tests discussed, controversy regarding use versus is summarized. The advocates mid p-value test sample sizes. Methods determination sizes tables also described. Keywords: chi-square test; contingency table; exact test; exact test; mid test; odds ratio; risk ratio; sample size
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