Question: A consumer organization wants to develop a regression model to predict gasoline mileage (as measured by miles per gallon) based on the horsepower of the

A consumer organization wants to develop a regression model to predict gasoline mileage (as measured by miles per gallon) based on the horsepower of the car’s engine and the weight of the car (in pounds). A sample of 50 recent car models was selected (see the Auto file).

(a) State the multiple regression equation.

(b) Interpret the meaning of the slopes, b1 and b2, in this problem.

(c) Explain why the regression coefficient, b0, has no practical meaning in the context of this problem.

(d) Predict the miles per gallon for cars that have 60 horsepower and weigh 2,000 pounds.

(e) Perform a residual analysis on your results and determine the adequacy of the fit of the model.

(f) Compute the coefficient of multiple determination, r2, and interpret its meaning.

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