Which of the following statements about Pearson's correlation coefficient is not true?
A)It varies between -1 and +1.
B)It can be used as an effect size measure.
C)It can be used on ranked data.
D)It cannot be used with binary variables (those taking on a value of 0 or 1).

Question

Quizplus · Accepted Answer

Pearson's correlation coefficient can be used on continuous variables, but not on binary variables that only take on values of 0 or 1. For binary variables, other measures like point-biserial or phi coefficient should be used.

Which of the Following Statements About Pearson's Correlation Coefficient Is