Scores Deviations Squared Deviations Products X Y X - MX Y - MY (X - MX)² (Y - MY)² (X - MX)(Y - MY) 8 1 7 2 6 3 9 4 0 10 The sum of squares for x is SSx = . The sum of squares for y is SSy = . The sum of products is SP = . Because the sign of the sum of products is , the sign of the correlation coefficient . The correlation coefficient is r = . Look at your scatter diagram again. If you excluded the point (0, 10), you would expect the recalculated correlation coefficient to be , because .