# Question

For a population data set, σ = 12.5

a. How large a sample should be selected so that the margin of error of estimate for a 99% confidence interval for µ is 2.50?

b. How large a sample should be selected so that the margin of error of estimate for a 96% confidence interval for µ is 3.20?

a. How large a sample should be selected so that the margin of error of estimate for a 99% confidence interval for µ is 2.50?

b. How large a sample should be selected so that the margin of error of estimate for a 96% confidence interval for µ is 3.20?

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