A Local Tire Dealer Wants to Predict the Number of Tires

question 107

Multiple Choice

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
Using the sums of the squares given above,determine the 95% confidence interval for the slope.

• A)(1.951 4.049)
• B)(-4.552 6.552)
• C)(-.0492 2.0492)
• D)(0.259 1.741)

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