For Exercises 23–30, follow these steps. Assume that the regression model assumptions are valid.

  1. Find for a 95% confidence interval for .
  2. Find the margin of error .
  3. Construct a 95% confidence interval for .

Question 13.27

27. Data in Exercise 11

13.1.27

(a) (b) (c) (–0.7598, −0.2402)