How does the concentration of dissolved oxygen in a coastal estuary relate to the abundance of a specific indicator species, the bent-nosed clam (Macoma nasuta)? To investigate this, a marine biologist collected water samples and counted the number of clams per square metre at ten different sampling sites along the estuary.
The results are presented in the table below:
| Sampling Site | Dissolved Oxygen Concentration (mg/L) | Clam Density (Count per m2m^2m2) |
|---|---|---|
| 1 | 7.8 | 42 |
| 2 | 3.2 | 12 |
| 3 | 5.5 | 24 |
| 4 | 4.1 | 18 |
| 5 | 6.4 | 35 |
| 6 | 2.1 | 5 |
| 7 | 8.3 | 48 |
| 8 | 5.0 | 22 |
| 9 | 6.9 | 38 |
| 10 | 3.6 | 15 |
Draw a fully labelled scatter diagram displaying the data from this study.
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.