A local tire dealer wants to predict the number of tires sold each month.He believes that the number of tires sold is a linear function of the amount of money invested in advertising.He randomly selects 6 months of data consisting of tire sales (in thousands of tires) and advertising expenditures (in thousands of dollars) .Based on the data set with 6 observations,the simple linear regression equation of the least squares line is = 3 + 1x.
= 24
= 124
= 42
= 338
= 196 MSE = 4
Use the least squares regression equation and estimate the monthly tire sales when advertising expenditures is $4000.
A) 4000 tires
B) 1000 tires
C) 3000 tires
D) 7000 tires
Correct Answer:
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