The formula for rho is actually just the formula for Pearson's r simplified to apply to lower order scaling.

Question

Quizplus · Accepted Answer

This statement is true. Pearson's r is a measure of linear correlation that applies to interval or ratio scaled variables, while rho is a measure of rank correlation that applies to ordinal or interval scaled variables. However, the formula for rho is simply the formula for Pearson's r applied to the ranks of the variables.

The Formula for Rho Is Actually Just the Formula for Pearson's