A 98% confidence interval for the ˜???? computed from the information in a random sample of ???? = 122 observations is 97.6 to 104.2.

(a) Interpret this confidence interval.

(b) Does this confidence interval support the claim that ˜???? = 100? Explain.

(c) Would a 95% confidence interval have been wider or narrower than this 98%

confidence interval? Explain.