Complete Table 1 and find the observed value of T T\,T by calculating the Wilcoxon Signed Ranks test for Dr. Elizabeth's study on the effects of a memory-enhancing herbal supplement on spatial awareness scores.
| Participant | Score before supplement (Condition A) | Score after supplement (Condition B) | Difference | Rank of Difference | Rank if positive | Rank if negative |
|---|---|---|---|---|---|---|
| A | 18 | 21 | ||||
| B | 25 | 20 | ||||
| C | 14 | 14 | ||||
| D | 32 | 30 | ||||
| E | 19 | 26 | ||||
| F | 22 | 21 | ||||
| G | 15 | 21 | ||||
| H | 28 | 24 | ||||
| Total: |
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 questions, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.