The average student loan debt of a U.S. college student
at the end of four years of college is estimated to be about
$22,000. You take a random sample of 150 college students in the
state of Wyoming and find that the mean debt is $19,850, and the
sample standard deviation is $2,180.
(a) Construct a 95% confidence interval for the mean debt of all
Wyoming college graduates.
(b) Construct a 98% confidence interval for the mean debt of all...