## Applying spearman's correlation

## What does the Speaman Correlation measure?

- The
*Spearman correlation*(denoted as*p*(rho) or*r*) measures the strength and direction of association between two ranked variables._{s} - It is most commonly used to measure the degree and direction of a linear relation between two variables that are of the ordinal type.

## What are the assumptions of the Spearman Correlation test?

- two variables that are either ordinal, interval or ratio (note: if the data are interval or ratio, normally you would use a Pearson correlation test)
- the relationship between the variables is monotonic, or (curvi)linear

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