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 and found to have a standard deviation of 4.5. If another sample was taken of 200 people again but the standard deviation was found to be 5, 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

as standard deviation is higher, the confience interval will get wider.

A.) become wider