A geography student measured the soil infiltration rate (in mm/hour) at ten different locations across a small drainage basin.
| Sample site | Soil infiltration rate (mm/hour) |
|---|---|
| A | 34 |
| B | 18 |
| C | 45 |
| D | 22 |
| E | 12 |
| F | 28 |
| G | 18 |
| H | 39 |
| I | 50 |
| J | 25 |
Calculate the median soil infiltration rate for these sample sites. You must show your working out.
