26. Breakfast cereals again We saw in Chapter 7 that the calorie count of a breakfast cereal is linearly associated with its sugar content. Can we predict the calories of a serving from its vitamin and mineral content? Here's a multiple regression model of Calories per serving on its Sodium (mg), Potassium (mg), and Sugars (g): Dependent variable is: Calories R-squared = 38.4% R-squared (adjusted) = 35.9% s = 15.60 with 77 4 = 73 degrees of freedom Source Sum of Squares dF Mean Square F-ratio P-value Regression 11091.8 3 3697.28 15.2