Spearman's Rho - StatsTest.com
https://www.statstest.com/spearmans-rhoSpearman’s Rho is also called Spearman’s correlation, Spearman’s rank correlation coefficient, Spearman’s rank-order correlation, and Spearman rho metric. Assumptions for Spearman’s Rho Every statistical method has assumptions. Assumptions mean that your data must satisfy certain properties in order for statistical method results to be accurate.