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You intend to estimate a population mean with a confidence interval. You believe the population to...

You intend to estimate a population mean with a confidence interval. You believe the population to have a normal distribution. Your sample size is 53.

Find the critical value that corresponds to a confidence level of 99.5%.
(Report answer accurate to three decimal places with appropriate rounding.)

ta/2 = ±

math   Statistics-And-Probability   
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