A measured value for the degree of the relation between two sets of data. The correlation coefficient r varies between -1 and 1. Positive correlations (between 0 and 1) indicate that high values in one set of data (e. g. the numerical result in a selection test) are related to high values in another set of data (e. g. an indicator for job success).
A statistical measure of the extent to which two variables are associated.
Statistical procedure for estimating the relationship between two variables, x and y