Question: (a) If N=200 and X=80 construct a 95% confidence interval estimate of the population proportion __ < < __ (round to four decimal places

(a) If N=200 and X=80 construct a 95% confidence interval estimate of the population proportion __ < π < __ (round to four decimal places as needed)
(b) If you want to be 95% confident of estimating the population mean to within a sampling error of + 5 and a standard deviation is assumed to be 19, The sample size required is ___ (Round to the nearest integer)

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