Which of the following describes Pearson's r?
A) It is the average amount by which the scores in two sets of data differ from each other.
B) It is the cross-product of two variances.
C) It is average difference between X and Y, divided by N.
D) It is the mean cross-product of two sets of z scores.

Question

Quizplus · Accepted Answer

Pearson's r is a measure of the strength and direction of the linear relationship between two variables. It is calculated by finding the mean cross-product of the two sets of standardized variables (z-scores). Therefore, the correct description is D, and none of the other options accurately describe Pearson's r.

Which of the Following Describes Pearson's R