Dr Aris was interested in the relationship between adolescent smartphone usage and sleep quality. He recorded the average weekly screen time (in hours) and the sleep latency (the time taken to fall asleep, in minutes) of eight adolescent participants.
Table 1 shows the data Dr Aris collected.
Table 1:
| Participant | Weekly screen time (hours) | Sleep latency (minutes) |
|---|---|---|
| Participant A | 14 | 12 |
| Participant B | 18 | 15 |
| Participant C | 22 | 25 |
| Participant D | 25 | 20 |
| Participant E | 30 | 35 |
| Participant F | 35 | 42 |
| Participant G | 40 | 38 |
| Participant H | 45 | 55 |
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.