For Exercises 15–18, follow these steps. Assume that the regression model assumptions are valid.
15. Data in Exercise 7, where
13.1.15
(a) (b) (c) (d) (e) : There is no linear relationship between and . : There is a linear relationship between and . Reject if or . Since , we reject . There is evidence at level of significance that and that there is a linear relationship between and .