# Pearson's Product-Moment Correlation

From Displayr

The standard statistic used to quantify a correlation. It is commonly represented as *r*.

It is interpreted as follows:

- An
*r*of 1 indicates a perfect positive correlation. - An
*r*of -1 indicates a perfect negative correlation. - An
*r*of 0 indicates that there is no relationship between the different variables. - The closer
*r*is to 0, the weaker the correlation (and, equivalently, the further*r*is from 0 the stronger the correlation.

The following scatterplots show examples of Pearson's Product-Moment Correlation and associated p-Values.