What is Fisher's exact test? Fisher’s exact test is a statistical hypothesis test used to assess the association between two binary variables in a contingency table and is particularly useful when ...

WARNING: 50% of the cells have expected counts less than 5. (Asymptotic) Chi-Square may not be a valid test.

For the one-response, two-factor design with categorical data, Gart (1972) proposed a statistic to test the hypothesis of zero second-order interaction. It can be shown that unconditionally the ...

Assuming a multinomial sampling model, prior distributions are developed which can accept prior information about symmetry and independence in a two-way contingency table. Bayesian estimates for the ...

computes asymptotic tests for Somers' D(C|R). The Cochran-Armitage test checks for trend in binomial proportions across levels of a single factor. Use this test for a contingency table with a ...