All of the following are true EXCEPT:
A) The product moment correlation is denoted by ρ.
B) The coefficient r is an estimator of ρ.
C) The calculation of r assumes X and Y are metric.
D) Data that use rating scales with a small number of categories will tend to under estimate ρ.
E) Data that use rating scales with a small number of categories will tend to over estimate ρ.

Question

Quizplus · Accepted Answer

Data that use rating scales with a small number of categories will tend to overestimate r, not underestimate ρ as option D suggests. All the other options are true: The product moment correlation is denoted by ρ, the coefficient r is an estimator of ρ, and the calculation of r assumes X and Y are metric.

All of the Following Are True EXCEPT