Moving median smoothing
A waste service records collected material at consecutive months. The first observation is Month 1
| Period | Collected material |
|---|---|
| Month 1 | 150 |
| Month 2 | 170 |
| Month 3 | 190 |
| Month 4 | 210 |
| Month 5 | 230 |
| Month 6 | 250 |
| Month 7 | 270 |
| Month 8 | 290 |
| Month 9 | 310 |