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| Hays decides to test the overall effectiveness of the both independent variables in explaining sales for Milky Way. Assuming that the total sum of squares is 389.14, the sum of squared errors is 146.85 and the mean squared error is 2.576, then: A. The correlation between the actual and predicted values of estimated sales is 0.79. B. The R2 equals 0.242, indicating that the two independent variables account for 24.2% of the variation in monthly sales. C. The R2 equals 0.623, indicating that the two independent variables together account for 37.7% of the variation in monthly sales. |