A cognitive psychologist wanted to investigate how background noise affects concentration. Group A performed a problem-solving task in a quiet room, while Group B completed the same task in a room with loud background noise. All participants were given 20 minutes to solve a set of 20 complex anagrams. The table below shows the number of anagrams solved by each participant.
| Group A (Quiet) | Anagrams Solved | Group B (Noisy) | Anagrams Solved |
|---|---|---|---|
| Participant 1 | 11 | Participant 1 | 9 |
| Participant 2 | 14 | Participant 2 | 8 |
| Participant 3 | 15 | Participant 3 | 12 |
| Participant 4 | 12 | Participant 4 | 10 |
| Participant 5 | 16 | Participant 5 | 11 |
| Participant 6 | 12 | Participant 6 | 9 |
| Participant 7 | 15 | Participant 7 | 13 |
| Participant 8 | 17 | Participant 8 | 10 |
Which of these is the mean score of the participants in Group A (Quiet room)?
131313
141414
151515
161616
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.