Calculate moving means
The table gives members recorded by a community sports club in consecutive quarters
| Period | Members |
|---|---|
| Quarter 1 | 1,639 |
| Quarter 2 | 1,609 |
| Quarter 3 | 1,640 |
| Quarter 4 | 1,590 |
| Quarter 5 | 1,578 |
| Quarter 6 | 1,583 |
| Quarter 7 | 1,637 |
| Quarter 8 | 1,639 |
| Quarter 9 | 1,622 |
| Quarter 10 | 1,637 |