A Local Tire Dealer Wants to Predict the Number of Tires

question 10

Essay

A local tire dealer wants to predict the number of tires sold each month.The dealer believes that the number of tires sold is a linear function of the amount of money invested in advertising.The dealer 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 $\hat { y }$ = 3 + 1x. $\sum X$ = 24 $\sum X ^ { 2 }$ = 124 $\sum Y$ = 42 $\sum Y ^ { 2 }$ = 338 $\sum X Y$ = 196
MSE = 4
-Use the least squares regression equation and estimate the monthly tire sales when advertising expenditures is $4000

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Definitions:

Assembly Department

A division within a manufacturing facility where parts are put together to make a final product.

Cost Reconciliation Report

A document summarizing the costs in a production process, comparing expected costs to actual costs, and explaining differences or variances.

Weighted-Average Method

A cost accounting method used to calculate the cost per unit of inventory by considering the weighted average of the costs of the items available for sale.

Total Cost Accounted For

The comprehensive total of all costs recorded and allocated for a specific purpose or project.