Y Obs. X 13 un 15 6 7 12 13 A 11 6 8 CO Reference: 1 For Obs. 4, the z-score for the X variable is negative and for the Y variable the z-score is positive. What does this tell us? O The correlation coefficient is zero. O The X value for Obs. 4 is below its mean while the Y value for Obs. 4 is above its mean O The X value for Obs. 4 is above its mean while the Y value for Obs. 4 is below its mean O The X value for Obs. 4 is above its mean while the Y value for Obs. 4 is above its mean