Calculate the range for the Stroop interference scores (in milliseconds) shown in Table 1.
Table 1: Stroop interference scores (ms) for six participants
| Participant | Stroop interference score (ms) |
|---|---|
| P | 120 |
| Q | 340 |
| R | 210 |
| S | 95 |
| T | 285 |
| U | 150 |
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.