A sports psychologist conducted a study on the relationship between mental preparation and performance in youth athletes. She recorded the self-efficacy scores (on a scale of 10–50) and 100m sprint times (in seconds) of eight sprinters.
Complete the table and calculate Spearman’s rank correlation coefficient (rsr_srs) between self-efficacy score and sprint time.
| Self-efficacy score | Rank 1 | Sprint time (s) | Rank 2 | ddd | d2d^2d2 |
|---|---|---|---|---|---|
| 12 | 8.0 | 12.8 | 7.0 | ||
| 18 | 6.5 | 13.2 | 8.0 | ||
| 18 | 6.5 | 12.2 | 5.0 | ||
| 24 | 5.0 | 12.5 | 6.0 | ||
| 30 | 3.5 | 11.5 | 3.0 | ||
| 30 | 3.5 | 11.8 | 4.0 | ||
| 36 | 2.0 | 11.1 | 2.0 | ||
| 42 | 1.0 | 10.8 | 1.0 | ||
| 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.