Coefficient of Determination - short version

A measure of the part of the variance for one variable that can be explained by its linear relationship with a second variable.

Coefficient of Determination - long version

Coefficient of determination is used in the context of statistical models whose main purpose is the prediction of future outcomes on the basis of other related information. It is the proportion of variability in a data set that is accounted for by the statistical model. It provides a measure of how well future outcomes are likely to be predicted by the model.

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