Total Sum of Squares


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Total Sum of Squares - short version

The total variation in analysis of variance that is obtains by adding sum of squares (SSB) between and the sum of squares within (SSW).



Total Sum of Squares - long version

Total sum of squares (TSS) is a quantity that appears as part of a standard way of presenting results of such analyses. It is defined as being the sum, over all observations, of the squared differences of each observation from the overall mean. In statistical linear models, (particularly in standard regression models), the TSS is the sum of the squares of the difference of the dependent variable and its grand mean.



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