The Pearson product-moment correlation coefficient, r, requires that variables are measured with:
A) An interval or ratio scale.
B) An ordinal or ratio scale.
C) A nominal or ordinal scale.
D) A nominal or ratio scale.

Question

Quizplus · Accepted Answer

The Pearson product-moment correlation coefficient, r, requires that variables are measured with an interval or ratio scale as it involves computing the means, standard deviations, and covariances between mutually quantitative variables.

The Pearson Product-Moment Correlation Coefficient, R, Requires That Variables Are