You intend to estimate a population proportion with a confidence interval. The data suggests that the normal distribution is a reasonable approximation for the binomial distribution in this case. While it is an uncommon confidence level, find the critical value that corresponds to a confidence level of 87.4%. (Report answer accurate to three decimal places with appropriate rounding.) za/2 = ±
Added by Erin S.
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4%. The alpha level is 1 minus the confidence level. So, α = 1 - 0.874 = 0.126. Show more…
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