The ______ statistical procedure is used to measure the relationship between ordinal variables.

A) Pearson correlation (r)
B) linear regression
C) Spearman rank-order correlation
D) t-test

Ordinal Variables

Variables that represent categories with a natural order or ranking, but where the distances between categories are not necessarily equal.

Spearman Rank-Order

A nonparametric measure of rank correlation that assesses how well the relationship between two variables can be described using a monotonic function.