S3. Use the same variables as in Exercise 1, but do the analysis separately for white and black respondents. Click Data, Split File, and then select Organize Output by Groups. Insert RACECEN1 into the box and click OK. SPSS will split your results by RACECEN1 (focusing your analysis only on the categories for whites and blacks).

1. Is there any difference between the regression equations for whites and blacks?

2. What is the predicted number for whites and blacks with the same number of siblings: one sibling, four siblings, and seven siblings?