The following equations were estimated using the data in ECONMATH, with standard errors reported under coefficients. The average class score, measured as a percentage, is about 72.2; exactly 50% of the students are male; and the average of colgpa (grade point average at the start of the term) is about 2.81.

score 5 32.31 1 14.32 colgpa 12.002 10.702 n 5 856, R2 5 .329, R2 5 .328.

score 5 29.66 1 3.83 male 1 14.57 colgpa 12.042 10.742 10.692 n 5 856, R2 5 .349, R2 5 .348.