For a goodness-of-fit test,the number of degrees of freedom is k-2,where k is the number of categories.

Name: For a goodness-of-fit test,the number of degrees of freedom is k-2,where k is the number of categories.
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The number of degrees of freedom for a goodness-of-fit test is k-1, where k is the number of categories, because one degree of freedom is lost due to the constraint that the observed frequencies must sum to the total sample size.

For a Goodness-Of-Fit Test,the Number of Degrees of Freedom Is