The width of a confidence interval will be Ch9 A Narrower fo

The width of a confidence interval will be: (Ch9)

A. Narrower for 99% confidence than for 90% confidence

B. Wider for a sample size of 64 than for a sample size of 36

C. Wider for a 99% confidence than for 95% confidence

D. Narrower for sample size of 25 than for a sample size of 36

E. None of the above

Solution

C. the higher the degree of confidence needed the wider the interval has to be.