A simple random sample with n=54 provided a sample mean of 24and a sample standard deviation of 4.3 .
a. Develop a 90% confidence interval for the population mean (to1 decimal).
b. Develop a 95% confidence interval for thepopulation mean (to 1 decimal).
c. Develop a 99% confidence interval for the population mean (to1 decimal).
What happens to the margin of error and the confidence intervalas the confidence level is increased?
