Question: Reconsider the data and model estimated in Exercise 6.15. (a) Add the variables LIVAREA2 and AGE2 to the model, re-estimate it, and report the results.

Reconsider the data and model estimated in Exercise 6.15.

(a) Add the variables LIVAREA2 and AGE2 to the model, re-estimate it, and report the results.

250 FURTHER INFERENCE IN THE MULTIPLE REGRESSION MODEL

(b) Does an F-test suggest that the addition of LIVAREA2 and AGE2 has improved the model? Use a ¼ 0.05.

(c) Answer parts (b)–

(e) of Exercise 6.15 using the new specification. 

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