A developmental psychologist conducted a study into the relationship between prosocial disposition and hands-on altruistic behavior. She measured 10 participants' altruism scores (using an assessment scale) alongside the average number of volunteering hours they completed per week.
The raw data and the sequential ranks for both variables are shown in the table below.
| Participant | Altruism score (0–50) | Volunteering hours per week | Rank of Altruism score | Rank of Volunteering hours |
|---|---|---|---|---|
| a | 42 | 2 | 7 | 2 |
| b | 15 | 5 | 2 | 3 |
| c | 25 | 8 | 3 | 5.5 |
| d | 48 | 12 | 9 | 8 |
| e | 30 | 8 | 5 | 5.5 |
| f | 45 | 15 | 8 | 9 |
| g | 10 | 1 | 1 | 1 |
| h | 50 | 20 | 10 | 10 |
| i | 35 | 10 | 6 | 7 |
| j | 28 | 6 | 4 | 4 |
Explain why the data for volunteering hours for participants (c) and (e) have both been given the rank of 5.5.
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.