A sales manager collected the following data on annual sales for new customer accounts and the number of years of experience for a sample of 10 salespersons. Salesperson Years ofExperience Annual Sales($1,000s) 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) Develop a scatter diagram for these data with years of experience as the independent variable.     (b) Develop an estimated regression equation that can be used to predict annual sales (in $1,000s) given the years of experience. ŷ =     (c) Use the estimated regression equation to predict annual sales (in $1,000s) for a salesperson with 9 years of experience. $ thousand

A First Course in Probability (10th Edition)
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Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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A sales manager collected the following data on annual sales for new customer accounts and the number of years of experience for a sample of 10 salespersons.
Salesperson Years of
Experience
Annual Sales
($1,000s)
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)
Develop a scatter diagram for these data with years of experience as the independent variable.
 
 
(b)
Develop an estimated regression equation that can be used to predict annual sales (in $1,000s) given the years of experience.
ŷ =
 
 
(c)
Use the estimated regression equation to predict annual sales (in $1,000s) for a salesperson with 9 years of experience.
$ thousand
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