As the mean IQ of a nation increases,the mean level of national happiness:
A)decreases.
B)increases.
C)remains unchanged,but the standard deviation in happiness decreases.
D)remains unchanged,but the standard deviation in happiness increases.

Question

Quizplus · Accepted Answer

Research has shown that there is a positive correlation between national IQ and national level of happiness. Therefore, as the mean IQ of a nation increases, the mean level of national happiness is likely to increase as well.

As the Mean IQ of a Nation Increases,the Mean Level