12.112 You have been asked to develop a model that will predict the percentage of students who graduate in 4 years from highly ranked private colleges.

The data file Private Colleges contains data collected by a national news service; descriptions of the predictor variables are contained in the Chapter 12 appendix.

a. Specify a list of potential predictor variables with a short rationale for each variable.

b. Use multiple regression to determine the conditional effect of each of these potential predictor variables.

c. Eliminate those variables that do not have a significant conditional effect to obtain your final model.

d. Prepare a short discussion regarding the conditional effects of the predictor variables in your model, based on your analysis.