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Fisher's Exact Test

Graham J. G. Upton
Journal of the Royal Statistical Society. Series A (Statistics in Society)
Vol. 155, No. 3 (1992), pp. 395-402
Published by: Wiley for the Royal Statistical Society
DOI: 10.2307/2982890
Stable URL: http://www.jstor.org/stable/2982890
Page Count: 8
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Fisher's Exact Test
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Abstract

This paper reviews the problems that bedevil the selection of an appropriate test for the analysis of a 2 × 2 table. In contradiction to an earlier paper, the author now argues the case for the use of Fisher's exact test. It is noted that all test statistics for the 2 × 2 table have discrete distributions and it is suggested that it is irrational to prescribe an unattainable fixed significance level. The use of mid-P is suggested, if a formula is required for prescribing a variable tail probability. The problems of two-tail tests are discussed.

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