LaTeX Questions Answered
The correlation coefficient is a formula used to measure the strength of the relationship between the relative changes in two variables.
The following video describes how to write one version of the correlation coefficient:
Note that the video says that the way to write the sigma in the equation is to use the command
\Sigma. While this will produce a sigma, another command that will do the same is
\sum command produces a larger sigma that is more suitable for such an equation.