In multiple regression analysis,when the response surface (the graphical depiction of the regression equation)hits every single point,the sum of squares for error SSE = 0,the standard error of estimate s _{$\varepsilon$} = 0,and the coefficient of determination R² = 1.

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When the response surface hits every single point, SSE = 0, s is the standard error of estimate and is always greater than 0, and R^2 = 1.

In Multiple Regression Analysis,when the Response Surface (The Graphical Depiction ε\varepsilonε

In Multiple Regression Analysis,when the Response Surface (The Graphical Depiction $\varepsilon$