* * Homework Help - Q& A from Or X C & A Variable Has A Z-score Of 2: x C For A Certain Data Set The Correl. for Sarah Kayeye Ziki: 21. > courses/4080/quizzes/17908/take O X causes Y. Question 9 Obs. X Y SUX SUy SUx*SUy Predicted SUy Predicted Y Error Error 2 2 -5 1 -4 2 -3 4 -7 6 -14 7 -14 Assume this is population data. Reference: 2 Standard units (say for X) are calculated as: Of a z-score: SUx -Standard units of X (X minus Mean X) divided by Population Standard Deviation X O a z-score: SUx = Standard units of X(X minus Mean X) minus Population Standard Deviation X Or a z-score: SUx- Standard units of X = (X minus Mean X) minus Standard Deviation Y' Ofa.z-score: SUx - Standard units of X = (X minus Mean X)divided by Population Standard Deviation Y