Fisher's exact test for a 2x2 table
DescriptionFisher's exact test in the Tests menu is used to calculate an exact Pvalue for a 2x2 frequency table with small number of expected frequencies, for which the Chisquared test is not appropriate. Required inputThe data (representing number of cases) for the 2x2 table are entered in the dialog box. Example: treatment A resulted in 6 successes and 1 failure (6/7 = 85.7%) whereas treatment B resulted in 2 success and 8 failures (2/10 = 20%). The following is entered in the dialog box: The Pvalue (the probability of obtaining the observed result or a more extreme result) is calculated when you press the Test button. The result, P=0.015, indicates that the 2 treatments gave significantly different results. In the Comment input field you can enter a comment or conclusion that will be included on the printed report. Literature
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