Question
A sales manager collected the following data on x = years of experience and y =...
A sales manager collected the following data on x = years of experience and y = annual sales ($1,000s). The estimated regression equation for these data is
ŷ = 80 + 4x.
| Salesperson | Years of Experience |
Annual Sales ($1,000s) |
|---|---|---|
| 1 | 1 | 80 |
| 2 | 3 | 97 |
| 3 | 4 | 92 |
| 4 | 4 | 107 |
| 5 | 6 | 103 |
| 6 | 8 | 101 |
| 7 | 10 | 119 |
| 8 | 10 | 118 |
| 9 | 11 | 127 |
| 10 | 13 | 136 |
A. Compute SST, SSR, and SSE.
B. Compute the coefficient of determination
r2.
(Round your answer to three decimal places.)
C. What is the value of the sample correlation coefficient? (Round your answer to three decimal places.)
Homework Answers
Answer #1
A) SST= 2602
SSR= 2272
SSE =330
B) The coefficient of determination r2 = 0.873
c) The sample correlation coefficient = 0.934
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