This test is used to determine whether the means of the
different variables are significantly different from each
other.
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Fisher's exact probability test, chi-square test for
independence, Kolmogorov-Smirnov test, Spearman's Rank correlation
and many, many more.
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If the assumptions behind the chi-square test don't hold (e.g. more than 10% of your events have expected frequencies below 5) then consider using an exact test, such as Fisher's Exact Test for 2x2 contingency tables.