phat +/- Z.005*Sqrt(phat*(1-phat)/n) Z.005 = InvNorm(.005,0,1,RIGHT) = 2.5758
.85 +/- 2.5758*sqrt(.85*.15/600)
(0.812, 0.888)
We are 99% confident that the true proportion is between 0.812 and 0.888
Eva P.
asked • 03/26/20If n = 600 and ˆ p p ^ (p-hat) = 0.85, construct a 99% confidence interval. Give your answers to three decimals
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