Study the table below, which shows the size of ten bedload pebbles collected from a river channel.
| Pebble number | Pebble size (mm) |
|---|---|
| 1 | 12 |
| 2 | 8 |
| 3 | 15 |
| 4 | 6 |
| 5 | 22 |
| 6 | 11 |
| 7 | 8 |
| 8 | 14 |
| 9 | 5 |
| 10 | 19 |
Calculate the median pebble size. You must show your working out.
87 exam-style questions on OCR A GCSE Geography Numerical and statistical skills. Each one has a worked solution and a mark scheme showing where the marks go.