Calculate the correlation coefficient for the data collected in this study on soil pH and wildflower abundance. Use the formula for Spearman's ranked correlation coefficient presented below. Show your workings.
rs=1−6(∑d2)n(n2−1) r_s = 1 - \frac{6(\sum d^2)}{n(n^2-1)} rs=1−n(n2−1)6(∑d2)| Plot | Soil pH | Wildflower Count | Rank: Soil pH | Rank: Wildflower Count |
|---|---|---|---|---|
| A | 5.2 | 12 | 1 | 2 |
| B | 5.5 | 8 | 2 | 1 |
| C | 5.8 | 20 | 3 | 5 |
| D | 6.1 | 15 | 4 | 3 |
| E | 6.4 | 18 | 5 | 4 |
| F | 6.7 | 32 | 6 | 8 |
| G | 7.0 | 25 | 7 | 6 |
| H | 7.3 | 28 | 8 | 7 |
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.