χ² test

The χ² (chi-square) test is a crucial statistical tool in public health and epidemiology for analyzing categorical data. It helps determine whether there is a significant association between two categorical variables. For instance, researchers might use the χ² test to assess if there is a relationship between exposure _______ ____ __________ ____ _____ _________ ______ _________ ____ ________ _________ _____.
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