A study found correlation r = 0.43 between high school math grades (on a 0 to 100 scale) and income 10 years after high school. This means that
A) people with high math grades tend to have higher income than people with low math grades.
B) people with low math grades tend to have higher income than people with high math grades.
C) there is almost no association between math grades and income.
D) a mistake has been made because a correlation cannot be 0.43.
E) a mistake has been made because a correlation between math grades and income makes no sense.

Question

Quizplus · Accepted Answer

A correlation coefficient of 0.43 indicates a moderate positive relationship between high school math grades and income. This means that as the math grades increase, income tends to increase as well. However, this does not imply causation and there may be other factors that influence income apart from math grades.

A Study Found Correlation R = 0