Some researchers are interested in testing a nondirectional hypothesis to see if 2 variables (X and Y) are correlated. Use .05 for alpha level. X 25 2 3 1 18.75 2 50 SD 6.85 1.29 1. Is the hypothesis one-tailed or two-tailed? ANSWER: 2. What is the critical value? ANSWER: 3. What is the sum of the multiplied z scores (27.7x)? (X) (Y) Z Zy Zx . Zy 25 2 .91 -.39 -35 15 3 -55 .39 -.21 11 1 24 4 M 18.75 2.50 Ez,Zy = SD 6.85 1.29 4. By what number should you divide the sum of the multiplied z scores? ANSWER: 5. What is the r value? ANSWER: 6. Is the correlation significant? What conclusion can you make about variables X and Y