The correlation computed on two data sets that are in the form of ranks is usually called the
A) point-biserial correlation.
B) phi coefficient.
C) Spearman rho.
D) product-moment correlation.

Question

Quizplus · Accepted Answer

When the data sets are in the form of ranks, the appropriate correlation coefficient to be used is the Spearman rank correlation coefficient (rho). The point-biserial correlation coefficient is used when one variable is dichotomous (binary) and the other is continuous. The phi coefficient is used when both variables are dichotomous. The product-moment correlation coefficient is used when both variables are continuous and measured on an interval or ratio scale.

The Correlation Computed on Two Data Sets That Are in the Form