A cognitive psychologist is investigating whether the genre of background music affects concentration and memory. They compared the memory scores (out of 30) of participants who performed a recall task while listening to classical music with those who listened to lo-fi hip-hop music. The raw data and some of the assigned ranks from an independent measures statistical test are shown in the table below.
| Classical Music Background | Lo-fi Hip-Hop Background | ||
|---|---|---|---|
| Score | Rank | Score | Rank |
| 8 | 2 | 5 | 1 |
| 16 | 5 | 11 | 3 |
| 19 | 6 | 14 | 4 |
| 22 | 8 | 21 | 7 |
| 24 | 10 | 24 | 10 |
| 25 | 12 | 24 | 10 |
| 27 | 13 | 28 | 14 |
| 30 | 16 | 29 | 15 |
Explain why there are three ranks of 10.
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.