Conditional Independence, the Mantel-Haenszel Test, and the Yates Correction

Abstract The Yates correction is often recommended as a means of improving the chi-squared approximation to the Pearson goodness-of-fit statistic in 2 × 2 tables. This article demonstrates that it is also needed for some conditional independence models in multiway tables containing two dichotomies. The assumptions of the Mantel-Haenszel test are discussed.

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