1. Conduct the multiple regression testing the curvilinear effect of Homework on Grades conducted earlier in this chapter. Compare your results to mine. Make sure you are able to correctly center the...

1. Conduct the multiple regression testing the curvilinear effect of Homework on Grades conducted earlier in this chapter. Compare your results to mine. Make sure you are able to correctly center the variables and create the Homework squared term. Graph the curved regression line.

2. Does TV viewing have a curvilinear effect on Grades? Spend a few minutes thinking about this question. If you believe TV viewing has such an effect, what do you think will be the shape of the regression line: negative and concave; negative and convex? Use NELS to test this question. Use F1S45A as a measure of TV viewing and FFUGrad as a measure of 10th-grade GPA. Also control for SES and Previous Achievement (BySES and ByTests).