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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.

Regression is one of the most powerful statistical tools for finding relationships in data. Python makes it easy, and it's much more flexible than a spreadsheet.

The residual sum of squares (RSS) is a statistical technique used to measure the variance in a data set that is not explained by the regression model.

STAT 3400 - Applied Regression Introduces methods, theory, and applications of linear statistical models, covering topics such as estimation, residual diagnostics, goodness of fit, transformations, ...

The article How to Calculate the Regression of 2 Stocks Using Excel originally appeared on Fool.com. Try any of our Foolish newsletter services free for 30 days.