A sales manager collected the following data on annual sales and years of experience. The estimated regression equation is Ybar=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
a) Compute the SST SSR and SSE
b) Compute the coefficient of determination r^2 comment on the goodness of fit.
c) What is the value of the sample correlation coefficient.