In a certain population with a mean IQ of 100, the heritability of IQ was measured at 0.6. A chapter of Mensa in this population has an average IQ of 140. If they are otherwise typical of their population, about how many of their IQ points can be attributed to their genes?
A) 60
B) 84
C) 24
D) 100
E) 40

Question

Quizplus · Accepted Answer

Heritability of 0.6 means 60% of the IQ variation is due to genetic factors. The Mensa group's IQ is 40 points above the population mean, so 0.6 * 40 = 24 points can be attributed to their genes.

In a Certain Population with a Mean IQ of 100