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

Question

Quizplus · Accepted Answer

The Spearman rank-order correlation is used for one ordinal and one interval/ratio variable, while the point-biserial correlation is used for one nominal and one interval/ratio variable.

A Correlation Between One Interval/ratio Variable and One Ordinal Variable