1. Use the Grades, Parent Education, and Homework example from Chapter 2; make sure you can reproduce the residual analyses from this chapter (i.e., those summarized in Figures 3.6, 3.7, and 3.9)....

1. Use the Grades, Parent Education, and Homework example from Chapter 2; make sure you can reproduce the residual analyses from this chapter (i.e., those summarized in Figures 3.6, 3.7, and 3.9). Output residuals and predicted scores, and examine their descriptive statistics and correlations with Grades and each other. Make sure you understand why you obtain the relations you find.

2. Create a composite variable weighting Parent Education and Homework by their regression weights as found in Exercise 1. Regress Grades on this composite. Note that you can weight the original variables using the unstandardized regression weights, or you can first standardize Parent Education and Homework (convert them to
z-scores) and then weight them by the appropriate b’s. How do the
R2 and sums of squares compare to the multiple regression results?