[Solution Library] Consider the following time series Year Quarter Sales 1 1 6 1 2 15 1 3 10 1 4 4 2 1 10 2 2 18 2 3 15 2 4 7 3 1 14 3 2 26 3 3 23 3 4 12 4
Question: Consider the following time series
| Year | Quarter | Sales |
| 1 | 1 | 6 |
| 1 | 2 | 15 |
| 1 | 3 | 10 |
| 1 | 4 | 4 |
| 2 | 1 | 10 |
| 2 | 2 | 18 |
| 2 | 3 | 15 |
| 2 | 4 | 7 |
| 3 | 1 | 14 |
| 3 | 2 | 26 |
| 3 | 3 | 23 |
| 3 | 4 | 12 |
| 4 | 1 | 19 |
| 4 | 2 | 28 |
| 4 | 3 | 25 |
| 4 | 4 | 18 |
| 5 | 1 | 22 |
| 5 | 2 | 34 |
| 5 | 3 | 28 |
| 5 | 4 | 21 |
| 6 | 1 | 24 |
| 6 | 2 | 36 |
| 6 | 3 | 30 |
| 6 | 4 | 20 |
| 7 | 1 | 28 |
| 7 | 2 | 40 |
| 7 | 3 | 35 |
| 7 | 4 | 27 |
- Compute the corresponding 4-quarter moving average.
- Find the seasonal indexes.
- What is the quarter with the largest seasonal effect.
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