A chi-square goodness-of-fit test with five levels of a categorical variable will have four degrees of freedom.

Name: A chi-square goodness-of-fit test with five levels of a categorical variable will have four degrees of freedom.
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The degrees of freedom for a chi-square goodness-of-fit test are calculated as the number of levels of the categorical variable minus one, so with five levels, the degrees of freedom would be 5 - 1 = 4.

A Chi-Square Goodness-Of-Fit Test with Five Levels of a Categorical