An educational psychologist wanted to investigate the effect of background noise on concentration and reading comprehension. Group A completed a reading task in a quiet room, while Group B completed the same task in a room with background office noise playbacks (75 dB). All participants answered 25 comprehension questions about the text.
| Group A (Quiet room) | Number of questions answered correctly | Group B (Noisy room) | Number of questions answered correctly |
|---|---|---|---|
| 1 | 22 | 1 | 15 |
| 2 | 24 | 2 | 16 |
| 3 | 21 | 3 | 14 |
| 4 | 23 | 4 | 17 |
| 5 | 8 | 5 | 15 |
| 6 | 22 | 6 | 18 |
| 7 | 25 | 7 | 16 |
Which of these results from the table above would be classed as anomalous data?
888
151515
181818
212121
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.