A Local Tire Dealer Wants to Predict the Number of Tires

question 88

Short Answer

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 ŷ = 3 + 1x.
∑X = 24
∑X² = 124
∑Y = 42
∑Y² = 338
∑XY = 196
MSE = 4
Using the sums of the squares given above, determine the 90 percent confidence interval for the mean value of monthly tire sales when the advertising expenditure is $5,000.

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Definitions:

Fair Value

The price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants.

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Pension plans that promise a specified monthly benefit at retirement, which may be calculated through a formula based on earnings and years of service.

Required Disclosure

Obligatory sharing of specific financial or operational information by a company, as mandated by regulatory bodies or laws.

Projected Benefit Obligation

A measurement of the present value of future pension liabilities, based on expected future salary increases.