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A statistical test that allows one to determine whether observed quantities of a specific characteristic differed from the expected value purely by chance.

There are two common methods for statistical inference on 2 × 2 contingency tables. One is the widely taught Pearson chi-square test, which uses the well-known χ2 statistic. The chi-square test is ...

This is a preview. Log in through your library . Abstract In a departure from previous comparisons of the relative efficiency of pair-matched with independent samples, this note considers matching as ...