| Zone A (Conifer Plantation) | Zone B (Ancient Deciduous) | Zone C (Restored Meadow) |
|---|---|---|
| 4.1 | 5.8 | 6.5 |
| 4.3 | 6.2 | 6.8 |
| 4.5 | 5.5 | 6.2 |
| 3.9 | 6.0 | 6.9 |
| 4.2 | 5.9 | 6.4 |
| 4.4 | 6.1 | 6.6 |
| 4.0 | 5.7 | 6.3 |
A student collected soil pH measurements from three distinct ecological management zones in a nature reserve to investigate the impact of vegetation cover on soil acidity.
Which of the following graphical presentation techniques would be the most appropriate to visually compare the range, median, and spread of the pH values across these three zones?
Triangular graph
Scatter graph
Dispersion graph
Radial diagram