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Continuity Correction for Fisher's Exact Probability Test

University of Texas Medical School, Houston

Fisher's exact probability test is severely conservative when interpreted with reference to conventional alpha levels due to the discontinuity of the sampling distribution for 2 x 2 tables. An adjustment of the cell frequencies is proposed that results in a correction for continuity with appropriate alpha protection and increased power.

Key Words: Exact probability • 2 x 2 tables • Continuity correction

Journal of Educational and Behavioral Statistics, Vol. 5, No. 2, 177-190 (1980)
DOI: 10.3102/10769986005002177


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