A psychologist records the anxiety scores of 77 patients before and after a therapy session. The differences after minus before are −3,2,1,−2,4,−1,3-3, 2, 1, -2, 4, -1, 3. According to the Wilcoxon signed-ranks test, what are the sum of the positive ranks and the sum of the absolute values of the negative ranks?

Sum of positive ranks =17.5= 17.5Sum of negative ranks =10.5 = 10.5

Sum of positive ranks =15.5 = 15.5Sum of negative ranks =12.5= 12.5

Sum of positive ranks =16=16Sum of negative ranks =11 = 11

Sum of positive ranks =18 = 18Sum of negative ranks =9 = 9

A psychologist records the anxiety scores of 77 patients before a...

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