# Question

Refer to Exercise 13.6. Include the square of each of the explanatory variables and all cross- product terms in your model selection procedure.

a. Use a variable selection procedure with maximum BIC R2adj as the criterion to formulate a model.

b. Use a variable selection procedure Cp as the criterion to formulate a model.

c. Use a variable selection procedure with minimum BIC statistic as the criterion to formulate a model.

d. Compare the included terms from the models formulated with the three criteria in parts (a)–(c).

In exercise

a. Use a variable selection procedure with maximum BIC R2adj as the criterion to formulate a model.

b. Use a variable selection procedure Cp as the criterion to formulate a model.

c. Use a variable selection procedure with minimum BIC statistic as the criterion to formulate a model.

d. Compare the included terms from the models formulated with the three criteria in parts (a)–(c).

In exercise

## Answer to relevant Questions

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