High Quality Content by WIKIPEDIA articles! In statistical data analysis the 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 differences of each observation from the overall mean. Statistics is the science of making effective use of numerical data relating to groups of individuals or experiments. It deals with all aspects of this, including not only the collection, analysis and interpretation of such data, but also the planning of the collection of data, in terms of the design of surveys and experiments.

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