Compute the correlation between Xvariable and Yvariable (15 pts.) a. Compute all z-scores for Xvariable b. Compute all z-scores for Yvariable c. Compute cross-products of these Z scores d. Calculate Pearson-r using Z-score formula Write a clear interpretation of the observed relationship. What is the direction of this correlation and what does it mean? X-X Z= S r = ZxZ N-1 Descriptive Statistics N Mean Std. Deviation Variance Xvariable score of X 4 4.50 1.291 1.667 Yvariable score of Y 4 3.75 1.708 2.917 Valid N (listwise) *Ex 2.3 correlation n=4.sav [DataSet2] - IBM SPSS Statistics Data Editor File Edit View Data Transform Analyze Graphs Utilities Extensions Window Help CHE He 18: 1 ID Xvariable Yvariable ZXvariable ZYvariable ZxtimesZy 1 1 4 6 4 23 3 356 234 2 3 4 5 6 *