A sports psychologist investigated the effects of two different mental preparation techniques on the performance of professional basketball players. Table 1 shows the number of successful free-throws (out of 20) made by a sample of 10 players under two different conditions: Guided Visualization and Quiet Meditation.
| Player | Guided Visualization | Quiet Meditation |
|---|---|---|
| Player A | 15 | 2 |
| Player B | 16 | 18 |
| Player C | 14 | 5 |
| Player D | 15 | 15 |
| Player E | 15 | 10 |
| Player F | 17 | 12 |
| Player G | 13 | 8 |
| Player H | 15 | 17 |
| Player I | 14 | 3 |
| Player J | 16 | 10 |
| Mean | 15.0 | 10.0 |
State how the standard deviation for the Guided Visualization condition would differ from the standard deviation for the Quiet Meditation condition.
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.