The residual is the sum of deviations from a best-fit curve of arbitrary form.

The residual should not be confused with the correlation coefficient.

The residual is the sum of deviations from a best-fit curve of arbitrary form.

The residual should not be confused with the correlation coefficient.

Weisstein, Eric W. "Residual." From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/Residual.html