An occupational psychologist is investigating the relationship between years of professional experience and job performance score (rated on a scale of 1–50) for seven software developers.
Complete the table and calculate Spearman’s rank correlation coefficient (rsr_srs) between years of experience and job performance score. Show your working and give your final answer to two decimal places.
| Years of experience | Rank 1 | Job performance score | Rank 2 | ddd | d2d^2d2 |
|---|---|---|---|---|---|
| 3 | 6.5 | 8 | 7 | ||
| 3 | 6.5 | 12 | 5.5 | ||
| 5 | 4.5 | 12 | 5.5 | ||
| 5 | 4.5 | 15 | 3.5 | ||
| 8 | 3 | 15 | 3.5 | ||
| 10 | 2 | 18 | 2 | ||
| 12 | 1 | 20 | 1 | ||
| 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.