If the correlation between variables A and B is positive,then which of the following is true?
A)The mean value of A is greater than the mean value of B.
B)The mean value of B is greater than the mean value of A.
C)Measurements of one variable help us predict the other one, approximately.
D)Over time, the mean values of both A and B have been increasing.

Question

If the correlation between variables A and B is positive,then which of the following is true?​
A)The mean value of A is greater than the mean value of B.
B)​The mean value of B is greater than the mean value of A.
C)​Measurements of one variable help us predict the other one, approximately.
D)​Over time, the mean values of both A and B have been increasing.

Quizplus · Accepted Answer

A positive correlation indicates that as values of variable A increase, values of variable B also tend to increase. Therefore, measurements of one variable (A) can help predict the other variable (B) approximately. The mean values of A and B do not have a direct relationship with the correlation between the two variables, so options A and B are not correct. Option D suggests a trend in the mean values of A and B, which is not necessarily true based on the information given.

If the Correlation Between Variables a and B Is Positive,then