When to use Spearman Rho?

Answer 1

Spearman's Rho is used when you want to assess the strength and direction of a monotonic relationship between two variables that may not necessarily be normally distributed. It is particularly useful for ordinal data or when the assumptions of parametric tests, like Pearson's correlation, are violated. Additionally, it is appropriate when dealing with small sample sizes or when the data contains outliers, as it is less sensitive to these issues.