Calculate moving means
A time series records boardings for a regional bus service once each week; the recorded values are shown below
| Period | Bus boardings |
|---|---|
| Week 1 | 7,582 |
| Week 2 | 7,320 |
| Week 3 | 7,334 |
| Week 4 | 7,347 |
| Week 5 | 7,474 |
| Week 6 | 7,774 |
| Week 7 | 7,574 |
| Week 8 | 7,664 |
| Week 9 | 7,592 |
| Week 10 | 7,982 |