The R2 (R-square) of a multiple regression of y on x1 and x2 measures the . A) percentage of the variation in y that is explained by the variability of x1 B) percentage of the variation in y that is explained by the variability of x2 C) statistical significance of the coefficients in the sample regression equation D) percentage of the variation in y that is explained by the sample regression equation

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step-by-step explanation:

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