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An Evaluation of Power and Sample-Size Requirements for the Continuity-Corrected Fisher Exact Test

John E. Overall, Chris W. Hornick

Open publisher page 3 citations

Abstract

This article evaluates power and Type I error probabilities for a modified Fisher exact test for homogeneity of response probabilities in 2 × 2 tables. The original Fisher exact test and the Pearson chi-square are employed as standards for comparison. The continuity-corrected Fisher statistic is shown to be considerably more powerful than the uncorrected Fisher exact test, while it is less often nonconservatively biased than the Pearson chi-square.

About this research paper

What this paper is about

This article evaluates power and Type I error probabilities for a modified Fisher exact test for homogeneity of response probabilities in 2 × 2 tables. The original Fisher exact test and the Pearson chi-square are employed as standards for comparison. The continuity-corrected Fisher statistic is shown to be considerably more powerful than the uncorrected Fisher exact test, while it is less often nonconservatively biased than the Pearson chi-square.

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OpenAlex reports 3 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

This article evaluates power and Type I error probabilities for a modified Fisher exact test for homogeneity of response probabilities in 2 × 2 tables. The original Fisher exact test and the Pearson chi-square are employed as standards for comparison. The continuity-corrected Fisher statistic is shown to be considerably more powerful than the uncorrected Fisher exact test, while it is less often nonconservatively biased than the Pearson chi-square.

Key concepts: Exact test, Pearson's chi-squared test, Statistics, Mathematics, Chi-square test, Exact statistics, Statistic, Fisher kernel

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