Part 1 out of 2 How large a sample must be drawn so that a 9

Part 1 out of 2 How large a sample must be drawn so that a 98% confidence interval for mu will have a margin of error equal to 1.3? Round up the answer to the nearest integer. A sample size of is needed to be drawn in order to obtain a 98% confidence interval with a margin of error equal to 1.3.

Solution

Margin of error=z*s/sqrt(n)

z=2.33 for 98% confidence level,standard deviation s=17.3 margin of error=1.3

Applying values we get sample n=576