Environmental psychologists investigated how subjective noise annoyance levels differ between residents living near a newly constructed wind farm and those living near an active quarry. They used a self-report method, conducting an online survey completed by local residents during a peak operations week. The data from the first twenty Wind-farm residents and the first twenty Quarry residents to respond are presented in the table below.
Table 1: Ratings of subjective noise annoyance during peak operations week given by Wind-farm and Quarry resident participants (1 = 'not annoyed at all' to 10 = 'extremely annoyed')
| Wind-farm | Quarry |
|---|---|
| 8 | 7 |
| 5 | 8 |
| 9 | 6 |
| 10 | 9 |
| 4 | 8 |
| 7 | 5 |
| 10 | 7 |
| 3 | 8 |
| 8 | 9 |
| 9 | 6 |
| 5 | 8 |
| 10 | 7 |
| 2 | 9 |
| 8 | 8 |
| 6 | 6 |
| 9 | 7 |
| 4 | 8 |
| 10 | 9 |
| 3 | 7 |
| 5 | 8 |
Calculate the median rating of subjective noise annoyance levels during peak operations week given by the Wind-farm residents.
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.