The sampling distribution of the test statistic for a goodness-of-fit test with

*k*categories is:▸

approximately a chi-square distribution with*k *– 1 degrees of freedom.

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approximately a chi-square distribution with*k*degrees of freedom.

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a chi-square distribution with*k *– 1 degrees of freedom.

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a Student’s*t*distribution with*k *– 1 degrees of freedom.