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. Find...

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.


Find the critical value that corresponds to a confidence level of 99.5%.

(Report answer accurate to three decimal places with appropriate rounding.)




z
_a
/2 = ±