The sum of squares is a statistical measure used in regression analysis. Learn how to calculate the sum of squares and when to use it.

Assigning shares of "relative importance" to each of a set of regressors is one of the key goals of researchers applying linear regression, particularly in sciences that work with observational data.

A company’s beta is a measure of its volatility compared to the broader market. Here are two methods for calculating the beta of a private company.