If there are only two categories,the chi-squared goodness-of-fit test is the same as the z-test for p,the population proportion (as long as the sample/cell sizes meet the conditions).

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When there are only two categories, the chi-squared goodness-of-fit test is equivalent to the z-test for the population proportion, as long as the sample/cell sizes meet the necessary conditions.

If There Are Only Two Categories,the Chi-Squared Goodness-Of-Fit Test Is