(a) Using the estimates obtained in part

(a) of Exercise 8.8 as the parameter values, and assuming normally distributed errors, find the probability that (i) your 1400-

square-foot house sells for more than $115,000 and (ii) your 1800-square-foot house sells for less than $110,000.

(b) After making the correction ^

a^1 ¼ a^1 þ 1:2704; use the estimates obtained in parts

(d) and

(e) of Exercise 8.8 as the parameter values and, assuming normally distributed errors, find the probability that (i) your 1400-square-foot house sells for more than $115,000 and (ii) your 1800-square-foot house sells for less than

$110,000.

(c) Comment on and compare the answers you obtained in parts

(a) and (b).