A chi-square (χ2) statistic is a test that is used to measure how expectations compare to actual observed data or model ...

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

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The Canadian Journal of Statistics / La Revue Canadienne de Statistique The likelihood-ratio test (LRT) is considered as a goodness-of-fit test for the null hypothesis that several distribution ...