If one takes a sample of pairs of points over a narrow range of X or Y scores, what effect might this have on the value of r ?
A) inflate r
B) have no effect on r
C) reduce r
D) cannot be determined

Question

Quizplus · Accepted Answer

If the sample is taken over a narrow range of X or Y scores, it means that there is limited variability in the data. This can result in a smaller range of scores for both X and Y, which may lead to a smaller range of products in the numerator and/or smaller ranges for X and Y in the denominators of the formula for r. This can ultimately result in a lesser value of r.

If One Takes a Sample of Pairs of Points Over