Chapter 14.3, Problem 19E

In exercise 7 a sales manager collected the following data on x = annual sales and y = years of experience. The estimated regression equation for these data is ŷ = 80 + 4x.

Salesperson	Years of Experience	Annual Sales ($1000s)
1	1	80
2	3	97
3	4	92
4	4	102
5	6	103
6	8	111
7	10	119
8	10	123
9	11	117
10	13	136

1. a. Compute SST, SSR, and SSE.
2. b. Compute the coefficient of determination r². Comment on the goodness of fit.
3. c. What is the value of the sample correlation coefficient?