Question: Use the gasoline mileage data in Exercise 12-5 to build regression models using the following techniques: (a) All possible regressions. Find the minimum Cp and

Use the gasoline mileage data in Exercise 12-5 to build regression models using the following techniques:
(a) All possible regressions. Find the minimum Cp and minimum MSE equations.
(b) Stepwise regression.
(c) Forward selection.
(d) Backward elimination.
(e) Comment on the various models obtained.

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