Question: A confidence interval for the average time it takes a prospective employee to take a basic skills test is to be constructed at a 99.74%

A confidence interval for the average time it takes a prospective employee to take a basic skills test is to be constructed at a 99.74% confidence. If the population deviation for the data in question is 45 minutes, and the researcher desires a margin of error of 1.9 minutes, what should be the sample size?

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