In order for Pearson's r to be calculated,
A)both variables must be measured on a ratio scale
B)the relationship must be a linear one
C)at least one of the variables must have a restricted range
D)the variables must be measured on at least an ordinal scale

Question

Quizplus · Accepted Answer

Pearson's r requires that the relationship between the two variables is linear. It does not require ratio scales, and both variables should be at least interval scale, not ordinal. A restricted range can affect the correlation but is not a requirement for calculation.

In Order for Pearson's R to Be Calculated