When calculating a confidence interval for the difference between two population proportions,we multiply the standard error of the difference between sample proportions by t-multiple.

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When calculating a confidence interval for the difference between two population proportions, we multiply the standard error of the difference between sample proportions by a z-multiple, not a t-multiple, because the sampling distribution of the difference between two proportions tends to be normal due to the Central Limit Theorem.

When Calculating a Confidence Interval for the Difference Between Two