A multiple regression the coefficient of determination is 0.81. The percentage of the variation in $y$ that is explained by the regression equation is 81%.

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The coefficient of determination, denoted as $R^2$, represents the proportion of the variance in the dependent variable ($y$) that is predictable from the independent variables. A value of 0.81 means 81% of the variation in $y$ is explained by the regression model.

A Multiple Regression the Coefficient of Determination Is 0 yyy That Is Explained by the Regression Equation Is 81

A Multiple Regression the Coefficient of Determination Is 0 $y$ That Is Explained by the Regression Equation Is 81