What is the best statistical test to compare two groups?

Choosing a statistical test
Type of Data
Compare two unpaired groupsUnpaired t testFisher's test (chi-square for large samples)
Compare two paired groupsPaired t testMcNemar's test
Compare three or more unmatched groupsOne-way ANOVAChi-square test
Compare three or more matched groupsRepeated-measures ANOVACochrane Q**

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