A 95 confidence interval for the population mean is drawn fr

A 95% confidence interval for the population mean is drawn from a sample of 200. If the sample size were 500, then what would be true about the confidence interval?

A.) become wider

B.) become narrower

C.) would not change

D.) cannot be determined

E.) None of the above

Solution

B.) become narrower because higher sample size gives lower margin of error.