The correlation coefficient between the two variables, ear size and IQ score, is zero.What does this statement mean?
A) The scores of the two variables are evenly matched.
B) As the value of one variable changes, the other is not necessarily affected.
C) As the value of one variable changes, the other increases.
D) As the value of one variable changes, the other decreases.

Question

Quizplus · Accepted Answer

A correlation coefficient of zero means that there is no linear relationship between the two variables. Therefore, as the value of one variable changes, the other is not necessarily affected. Option A is incorrect because it implies that the variables have the same value, which is not necessarily true. Option C and D are incorrect because they suggest that there is a relationship between the two variables, which is not supported by a correlation coefficient of zero.

The Correlation Coefficient Between the Two Variables, Ear Size and IQ