There are two key assumptions for the Spearman’s rank correlation coefficient: The data should be on the ordinal or continuous scale. An example of an ordinal variable is a survey question that ranks ...

Spearman correlation is often more useful in SEO because it examines whether one factor tends to increase as another increases (or decreases), even if the relationship isn’t perfectly steady.

Spearman correlation test example. Let us suppose a university lecturer is interested in comparing 2 sets of exam scores from their class of 16 students to see if the 2 sets of exam results are ...