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==Fundamental equation of multiple regression analysis==
The coefficient of multiple determination ''R''<sup>2</sup> (a [[scalar (mathematics)|scalar]]), is computed using the [[Euclidean space|vector]] ''c'' of cross-correlations between the predictor variables and the criterion variable, its [[transpose]] ''c''', and the [[Matrix (mathematics)|matrix
::''R''<sup>2</sup> = ''c''' ''R''<sub>''xx''</sub><sup>−1</sup> ''c''.
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