Question: 20. Consider the data in Problem 19. (a) Use the stepwise regression method to fit the model Y = 0 + 1X1 + 2X2 +

20. Consider the data in Problem 19.

(a) Use the stepwise regression method to fit the model Y = β0 + β1X1 + β2X2 + β3X3 + ε

(b) Compute the Mallows’ Cp, PRESS and R2 pred statistics.

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