4) Standard units are calculated as ______ Where X and Y are variables, x is a value of the variable X. (Assume all calculations are for a population.)

a z-score: SU_X = Standard units of X = (x minus Mean X) divided by Standard Deviation X

a z-score: SU_X = Standard units of X = (x minus Mean X) minus Standard Deviation X

a F-score: SU_X = Standard units of X = (x minus Mean X) minus Standard Deviation Y

a SAT-score: SU_X = Standard units of X = (x minus Mean X) divided by Standard Deviation Y

Question 5 For Obs. 3, from the z-scores for the X variable and Y variable, what can we tell? (Assume a population.) TABLE 1 Obs. X 12 17 7 COVGUAWNY O The correlation coefficient is zero. O The X value is below its mean while the Y value is above its mean O The X value is above its mean while the Y value is below its mean O The X value is above its mean while the Y value is above its meanFor the scatterplot below, identify which correlation coefficient the plot represents. Yv. X 100 90 80 70 0 20 40 60 80 100 X O Near 1 O Near 0.5 O Near O O Near - 1What is the mean of Y? TABLE 2 Obs. SUx SUy SUx*SUy Predicted SUy Predicted Y Error Error*2 unawaNow Assume this is population data