SOLUTION: If n=260 and p' (p-prime) = 0.88, construct a 95% confidence interval. Give your answers to three decimals.

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Question 1201714: If n=260 and p' (p-prime) = 0.88, construct a 95% confidence interval.
Give your answers to three decimals.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
CI = p' ± z*(sqrt(p'*(1-p')/n))
First find the z-score.
Use calculator , we can find that the z-score for a 95% confidence interval which is approximately 1.96.
plug in the values:
CI = 0.88 ±+1.96%2A%28sqrt%280.88%2A%281-0.88%29%2F260%29%29

= 0.88 ± 0.057
Round to three decimals
CI = (0.823, 0.937)