Question

# A 31-run experiment was conducted with 6 independent predictor variables. The table below gives the

SS_{res} for all possible fitted models in the six variables. Select a "best" model using each of the approaches in a-f stated below. Use $α=0.05$

a. Backward elimination F-test.

b. Forward selection F-test.

c. Stepwise regression F-test.

d. Backward elimination based on Mallows' $C_{p}$

e. Forward selection based on Mallows' $C_{p}$

f. Stepwise regression based on Mallows' $C_{p}$

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