Dr. Jackson's research has found that the correlation between IQ and head circumference is +.10. From this information, we can conclude that
A) people with large heads have a higher IQ than people with small heads.
B) there is a weak relationship between head size and IQ.
C) people with small heads tend to have a higher IQ than people with large heads.
D) head circumference is an important predictor of IQ.

Question

Quizplus · Accepted Answer

The correlation coefficient of +.10 indicates a very weak relationship between head circumference and IQ. It is too weak to make any conclusions about IQ based solely on head size. Therefore, option B - there is a weak relationship between head size and IQ, is the correct answer.

Dr Jackson's Research Has Found That the Correlation Between IQ