Interpret and complete seasonal indices
A council records the mass of garden waste collected in each season. The table gives a seasonal index for each listed period
The displayed indices are exact at 1 decimal place; no unshown decimal places are used. Their average is exactly 1, so their sum is 6
The target period for interpretation is Sep–Oct
| Period | Seasonal index |
|---|---|
| Jan–Feb | 0.7 |
| Mar–Apr | 1.3 |
| May–Jun | 0.7 |
| Jul–Aug | 1.3 |
| Sep–Oct | 1.3 |
| Nov–Dec | 0.7 |