The point-biserial correlation coefficient is a measure of the direction and strength of the linear relationship between two variables,where ______.
A) one is continuous, and one is dichotomous
B) both variables are on an ordinal scale
C) one is at interval level or higher and one is ordinal
D) both variables are on a nominal scale

Question

Quizplus · Accepted Answer

The point-biserial correlation coefficient is specifically designed to measure the correlation between a continuous variable and a dichotomous variable. Therefore, the correct choice is A, where one variable is continuous and the other dichotomous. The other choices do not fit this criterion.

The Point-Biserial Correlation Coefficient Is a Measure of the Direction