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 smaller 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 weak positive relationship between head circumference and IQ. This means that there is a slight tendency for people with larger heads to have slightly higher IQ scores, but the relationship is not particularly strong or meaningful. Therefore, option A and C can be eliminated. Option D cannot be concluded as it is not stated whether head circumference is the only predictor of IQ or not.

DrJackson's Research Has Found That the Correlation Between IQ and Head