A correlation between two interval/ratio variables is measured using the _____ coefficient, and a correlation between one interval/ratio variable and one nominal variable is measured using the _____ coefficient.
A) Pearson product-moment correlation; Spearman rank-order correlation
B) Spearman rank-order correlation; Pearson product-moment correlation
C) phi; Spearman rank-order correlation
D) Pearson product-moment correlation; point-biserial correlation

Question

Quizplus · Accepted Answer

The Pearson product-moment correlation is used for two interval/ratio variables, while the point-biserial correlation is used for one interval/ratio variable and one nominal (binary) variable.

A Correlation Between Two Interval/ratio Variables Is Measured Using the _____