χ² test

The chi-squared (χ²) test is a statistical method used to determine if there is a significant association between two categorical variables. It is commonly used in research studies to determine if the observed data fits the expected distribution, or if there is a difference between the observed and expected frequencies.

The χ² test is a non-parametric test, which means that it does not assume any particular distribution for the data. It can be used with both small and large sample sizes, and it is suitable for nominal and ordinal data. The test works by comparing the observed frequencies in each category with the expected frequencies, and calculating a χ² _____ ____ ____ _________ _________ _____.
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