Explain why (a) 0 is used in computing the standard error of in the large sample test statistic for a hypothesis test about a population proportion (b) is used in computing the standard error of in the large sample confidence interval for a population proportion

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Question: Explain why (a) ????0 is used in computing the standard error of ???? in the large sample ????-test statistic for a hypothesis test about a

Explain why

(a) ????0 is used in computing the standard error of ˆ???? in the large sample ????-test statistic for a hypothesis test about a population proportion?

(b) ˆ???? is used in computing the standard error of ˆ???? in the large sample confidence interval for a population proportion?

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