Use the normal approximation for the Wilcoxon signed-ranks T test to analyze the data in Question 22 and state whether to retain or reject the null hypothesis.
In Question 22
Practitioners measured spiritual well-being (SWB) in a sample of 16 adults who were alcoholic before and following treatment for alcoholism. Test whether or not SWB changed following treatment using the Wilcoxon signed-ranks T test at a .05 level of significance and state whether to retain or reject the null hypothesis.
Change in SWB Following Treatment
-6 ................................................ -1
+12 .............................................. +20
+10 .............................................. -3
-2 ................................................ +7
-5 ................................................ +11
+13 .............................................. +15
+8 ............................................... +14
-4 ................................................ +9