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SXX. SXX is one of the components computed in finding the correlation and regression. It is a measure of variability. It is also known as the sum of squares of the variable x. Key Vocabulary: Standard Deviation: The formula for standard deviation uses the sum of the squares of the deviations from the mean.

Sxx in linear regression. Ask Question Asked 9 years, 1 month ago. Modified 1 year, 3 months ago.

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