Which statement about the correlation coefficient,r,is true?
A) The correlation coefficient computed for a population is denoted by ρ(rho).
B) Data obtained by using rating scales with a small number of categories tends to deflate r.
C) The calculation of r assumes that X and Y are metric variables whose distributions have the same shape.
D) All of the statements are true.

Question

Quizplus · Accepted Answer

All the statements are true: A) ρ (rho) is indeed the symbol for the population correlation coefficient. B) Using rating scales with few categories can reduce the variability and thus deflate r. C) The calculation of r assumes that X and Y are metric variables with similar distribution shapes.

Which Statement About the Correlation Coefficient,r,is True