Identify the formula to calculate the Pearson correlation coefficient (r) when N represents the number of paired scores; XY is the sum of the product of the paired X and Y scores; X is the sum of the X scores; Y is the sum of the Y scores; X2 is the sum of the squared X scores; and Y2 is the sum of the squared Y scores. Multiple choice question. r = NX2(X2)2 NY2(Y2)2(X) (Y) r = NXY(X)(Y)NX2(X)2NY2(Y)2 r = NXY+(X)(Y)NX2+(X2)2 NY2+(Y2)2 r = (X2)(Y2)NXY2