Question
Group A: 60, 57, 53, 42, 44, 48, 54, 39, 52, 45 Group B: 50, 49,...
Group A:
60, 57, 53, 42, 44, 48, 54, 39, 52, 45
Group B:
50, 49, 60, 55, 43, 56, 53, 69, 49, 52
Using Wilcoxen Rank Sum test to test a difference in the medians of the two populations using
Alpha= 0.05 n1=10 n2= 10
Homework Answers
Answer #1
Formula for calculating u value
Sample 1
Sum of ranks: 90.5
Mean of ranks: 9.05
Expected sum of ranks: 105
Expected mean of ranks: 10.5
U-value: 64.5
Expected U-value: 50
Sample 2
Sum of ranks: 119.5
Mean of ranks: 11.95
Expected sum of ranks: 105
Expected mean of ranks: 10.5
U-value: 35.5
Expected U-value: 50
Sample 1 & 2 Combined
Sum of ranks: 210
Mean of ranks: 10.5
Standard Deviation: 13.2288
The U-value is 35.5. The critical value of U at p < .05 is 23. Therefore, the result is not significant at p < .05.
The z-score is -1.0583. The p-value is .28914. The result is not significant at p < .05.
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