A sales manager collected the following data on annual sales for new customer accounts and the number of years of experience for a sample salespersons. Years of Annual Sales Salesperson Experience ($1000s) 1 1 80 2 3 82 3 96 4 95 93 6. 7 93 7 8 98 8. 10 106 11 121 10 13 125 The data on 24 - annual sales (81000s) for new customer ac counts and r pumber of vears of experience for a sample of 10 salespersons
A sales manager collected the following data on annual sales for new customer accounts and the number of years of experience for a sample salespersons. Years of Annual Sales Salesperson Experience ($1000s) 1 1 80 2 3 82 3 96 4 95 93 6. 7 93 7 8 98 8. 10 106 11 121 10 13 125 The data on 24 - annual sales (81000s) for new customer ac counts and r pumber of vears of experience for a sample of 10 salespersons
MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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Transcribed Image Text: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.
Years of
Annual Sales
Salesperson
Experience
($1000s)
1
1
80
3
82
3
4
96
4
5
95
5
93
6.
7
93
7
8
98
8
10
106
11
121
10
13
125
The data on y = annual sales ($1000s) for new customer accounts and x = number of years of experience for a sample of 10 salespersons
provided the estimated regression equation ŷ = 74.45 + 3.65x. For these data a = 6.7, ) (x; - x)² = 130.10, and s = 5.3015.
%3D
a. Develop the 95% confidence interval for the mean annual sales for all salespersons with twelve years of experience.
) (to 2 decimals)
b. The company is considering hiring Tom Smart, a salesperson with twelve years of experience. Develop a 95% prediction interval of annual sales
for Tom Smart.
) (to 2 decimals)
c. Discuss the differences in your answers to parts (a) and (b).
As expected, the prediction interval is much
- Select your answer - V than the confidence interval. This is due to the fact that it is more
- Select your answer -
to predict annual sales for one new salesperson with 12 years of experience than it is to estimate the mean annual sales
for all salespersons with 12 years of experience.
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