If black people were enslaved and forced to study math and standard academic English or be executed then their average IQ score would increase. If execution would not occur for getting wrong answers but only for not putting in the study time.
Disclaimer : I am not supporting execution or slavery by asking this hypothetical question
@shortstories Regression to the mean occurs upon each successive generation so the immediate Ben Carsonification of niggers you'd get would be short lived and the next generation would go back to being late night waffle house brawlers