Sarah wanted to investigate whether there was a correlation between weekly physical exercise and self-reported mood levels.
She randomly selected six members at a local health club who kept detailed logs of their weekly routines. At the end of a typical week, she recorded their weekly exercise hours and asked them to rate their average daily mood.
Sarah asked the members to rate their daily mood on a scale of 1 to 5 (where 1 was very low mood and 5 was very high mood).
The results of Sarah's study are shown in Table 1.
| Member | Weekly exercise (hours) | Self-reported mood score |
|---|---|---|
| A | 5 | 5 |
| B | 2 | 3 |
| C | 4 | 4 |
| D | 1 | 1 |
| E | 3 | 3 |
| F | 2 | 3 |
Complete Table 2 and calculate Spearman's rank correlation coefficient between the weekly exercise hours and the self-reported mood score. Round your final answer to two decimal places.
| Weekly exercise (hours) | Rank 1 | Self-reported mood score | Rank 2 | ddd | d2d^2d2 |
|---|---|---|---|---|---|
| 5 | 6 | 5 | 6 | ||
| 2 | 2.5 | 3 | 3 | ||
| 4 | 5 | 4 | 5 | ||
| 1 | 1 | 1 | 1 | ||
| 3 | 4 | 3 | 3 | ||
| 2 | 2.5 | 3 | 3 | ||
| Total: |
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.