Question: 19. Sales Experience and Sales Performance. In exercise 7 a sales manager collected the following data on x = annual sales and y = years

19. Sales Experience and Sales Performance. 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 yˆ = 80 + 4x.

Annual Years of Sales Salesperson Experience ($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

a. Compute SST, SSR, and SSE.

b. Compute the coefficient of determination r2. Comment on the goodness of fit.

c. What is the value of the sample correlation coefficient?

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