A psychologist researching anxiety wanted to see whether or not there was a relationship between severe generalized anxiety symptoms and sleep disturbance. He constructed two self-report scales and asked ten patients diagnosed with Generalized Anxiety Disorder (GAD) to complete them.
One scale measured the participant's level of generalized anxiety. A high score (out of 30) indicated high anxiety levels.
The other scale measured the level of sleep disturbance. A high score (out of 30) indicated severe sleep disturbance.
The two sets of results for each patient are shown in the table below.
Table 1: Anxiety score and sleep disturbance score for each patient
| Patient | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|
| Anxiety score | 5 | 7 | 8 | 11 | 12 | 15 | 18 | 20 | 22 | 25 |
| Sleep disturbance score | 15 | 6 | 11 | 8 | 17 | 10 | 22 | 14 | 23 | 21 |
Estimate the correlation coefficient most likely to result from analysis of the data in Table 1.
+0.95+0.95+0.95
+0.70+0.70+0.70
+0.30+0.30+0.30
+0.15+0.15+0.15
Practise AQA A Level Psychology Data handling and analysis with exam-style questions for A Level Psychology. 263 questions, matched to the AQA A Level Psychology (7182) 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.
