Fit the quadratic model from Problem 4.14 using either the bootstrap method or computing robust standard errors. Evaluate the results and compare them with the quadratic model results obtained in...

Fit the quadratic model from Problem 4.14 using either the bootstrap method or computing robust standard errors. Evaluate the results and compare them with the quadratic model results obtained in Problem 4.14. How are they similar or different?

Problem 4.14

Evaluate the appropriateness of the linear model used in Problem 2.2. If indicated, propose and evaluate an alternative model. The data are in Table D-1, Appendix D.

Table D-1