Chapter B.5, Problem 103E

a.

To determine

Obtain regression equation for the given data using the forward selection method with $t_{\text{enter}}=2.00$.

b.

To determine

Obtain regression equation for the given data using the backward elimination method with $t_{\text{remove}}=2.00$.

c.

To determine

Obtain regression equation for the given data using the stepwise regression method with $t_{\text{enter}}=2.00$ and $t_{\text{remove}}=2.00$.

d.

To determine

Compare the regression equations of the three methods.

e.

To determine

Perform the regression analysis.

Obtain the residual versus fitted values plot and residual plots for the included predictor variables for the stepwise regression model.

Obtain the normal probability plot of residuals for the stepwise regression model.