The chi-square test statistic used in a goodness-of-fit test has k − 1 degrees of freedom.

Name: The chi-square test statistic used in a goodness-of-fit test has k − 1 degrees of freedom.
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This is true. In a goodness-of-fit test, you are comparing observed frequencies to expected frequencies from a particular distribution or model. The test statistic used for this is the chi-square test, and its degrees of freedom are equal to the number of categories being compared minus 1 (k - 1).

The Chi-Square Test Statistic Used in a Goodness-Of-Fit Test Has