How does the dissolved oxygen level in a marine reserve relate to the concentration of a specific microalga? To investigate this, a marine biologist measured the dissolved oxygen concentration (in milligrams per litre, mg/L) and the microalga concentration (in millions of cells per litre) at ten different sampling sites.
The results are presented in the table below:
| Sampling Site | Dissolved Oxygen (mg/L) | Microalga Concentration (millions of cells per L) |
|---|---|---|
| A | 4.5 | 12 |
| B | 8.2 | 55 |
| C | 6.0 | 32 |
| D | 11.5 | 90 |
| E | 5.1 | 22 |
| F | 9.8 | 75 |
| G | 7.0 | 45 |
| H | 10.5 | 82 |
| I | 5.8 | 28 |
| J | 8.9 | 64 |
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.