Consider, some groups are more willing to guess when given incomplete information and the SAT promotes guessing. If there was a larger penalty for wrong answers other groups would do better. Another issue is retaking the SAT tends to increase scores as you keep your best individual score.
Individually adding ~30 points might mean little, but when you look at large groups of people such small changes become important.
Individually adding ~30 points might mean little, but when you look at large groups of people such small changes become important.