Question 10.41

10.41 More on public university tuition.

Refer to Exercise 10.15 (pages 504–505).

tuit

  1. The tuition at BusStat U was $8800 in 2008. Find the 95% prediction interval for its tuition in 2013.
  2. The tuition at Moneypit U was $15,700 in 2008. Find the 95% prediction interval for its tuition in 2013.
  3. Compare the widths of these two intervals. Which is wider and why?

10.41

(a) (6899, 13385). (b) (13024, 20400). (c) Moneypit U is wider because it is farther from the mean for Y2008.