When working with one nominal variable, a chi-square test for independence would be used.

Name: When working with one nominal variable, a chi-square test for independence would be used.
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A chi-square test for independence is used to analyze the relationship between two categorical variables, not for a single nominal variable. For one nominal variable, a chi-square goodness-of-fit test might be used to compare observed frequencies to expected frequencies.

When Working with One Nominal Variable, a Chi-Square Test for Independence