Marine biologists wanted to investigate whether there is a relationship between water depth and dissolved oxygen concentration at a specific coral reef. They collected samples from 9 different depths at random locations within the reef system.
The following results were obtained:
Table 1: Water depth (metres) and dissolved oxygen concentration (mg/L)
| Sampling Point | Depth of water (metres) | Dissolved oxygen concentration (mg/L) |
|---|---|---|
| 1 | 5 | 8.2 |
| 2 | 15 | 7.9 |
| 3 | 30 | 6.5 |
| 4 | 45 | 5.8 |
| 5 | 60 | 4.9 |
| 6 | 75 | 4.1 |
| 7 | 80 | 3.8 |
| 8 | 90 | 3.2 |
| 9 | 100 | 2.5 |
Write a suitable hypothesis for this investigation.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 689 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
