A correlation between two interval/ratio variables is measured using the _____ coefficient, and a correlation between two nominal variables is measured using the _____ coefficient.
A) Pearson product-moment correlation; phi coefficient
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 interval/ratio variables, and the phi coefficient is used for nominal variables.

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