Usage Note 22566: Interpretation of the Right- and Left-tailed p-values from Fisher's exact test for 2x2 tables
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If the Left probability value is small, the null hypothesis of equal row probabilities is rejected in favor of the alternative hypothesis that the probability of being in column 1 is less in row 1 than in row 2. Equivalently, the null hypothesis of equal column probabilities is rejected in favor of the alternative that the probability of being in row 1 is less in column 1 than in column 2.
If the Right probability value is small, the null hypothesis of equal row probabilities is rejected in favor of the alternative hypothesis that the probability of being in column 1 is greater in row 1 than in row 2. Equivalently, the null hypothesis of equal column probabilities is rejected in favor of the alternative that the probability of being in row 1 is greater in column 1 than in column 2.
Operating System and Release Information
| Product Family | Product | System | SAS Release | |
| Reported | Fixed* | |||
| SAS System | SAS/STAT | All | n/a | |