1. Jensen Tire & Auto is in the process of deciding whether to purchase a maintenance contract for its new computer wheel alignment and balancing machine. Managers feel that maintenance expense should be related to usage, and they collected the information on weekly usage (hours) and annual maintenance expense (in thousands of dollars).
SUMMARY OUTPUT 

Regression Statistics 

Multiple R 
0.9272 

R Square 
0.8597 

Adjusted R Square 
0.8422 

Standard Error 
4.1466 

Observations 
10 

ANOVA 

df 
SS 
MS 
F 
Significance F 

Regression 
1 
843.1737 
843.1737 
49.0391 
0.00011 

Residual 
8 
137.5513 
17.1939 

Total 
9 
980.7250 

Coefficients 
Standard Error 
t Stat 
Pvalue 
Lower 95% 
Upper 95% 

Intercept 
10.3350 
3.8186 
2.7065 
0.0268 
1.5293 
19.1408 
Weekly Usage (in Hrs) 
0.9586 
0.1369 
7.0028 
0.0001 
0.6429 
1.2742 
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