Olivia was interested in the relationship between ambient noise levels in a study room and the cognitive focus of students. She recorded the average noise level (in decibels) and the number of concentration errors made by students during a standard 10-minute task.
Table 1 below shows the data Olivia collected.
Table 1:
| Observation Session | Average noise level (decibels) | Number of concentration errors |
|---|---|---|
| Session 1 | 45 | 2 |
| Session 2 | 52 | 4 |
| Session 3 | 58 | 5 |
| Session 4 | 62 | 9 |
| Session 5 | 68 | 8 |
| Session 6 | 74 | 12 |
| Session 7 | 80 | 15 |
| Session 8 | 85 | 19 |
State a null hypothesis for this study.
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.