Comparative studies of the intelligence scores of the black and white populations in America indicate that __________.
A) there are no overlaps between the intelligence score distributions of these populations
B) the variability of scores within groups is greater than that between groups
C) the average of the two groups is the same, but there is more variability among white Americans
D) the average of the two groups is the same, but there is more variability among black Americans

Question

Quizplus · Accepted Answer

Comparative studies have consistently shown that there is overlap in the intelligence score distributions of black and white Americans. In fact, the variability of scores within groups is typically greater than that between groups. This means that while there may be some differences in average scores between the two groups, there is a significant overlap in individual scores that makes it impossible to use intelligence scores as a definitive measure of race-based cognitive ability.

Comparative Studies of the Intelligence Scores of the Black and White