You want to forecast the quarterly demand of a product. The quarterly demand (in units) for the
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Question:
You want to forecast the quarterly demand of a product. The quarterly demand (in units) for the past three years are listed below.
| Quarter | Year 1 | Year 2 | Year 3 |
| 1 | 338 | 380 | 433 |
| 2 | 120 | 170 | 191 |
| 3 | 385 | 411 | 455 |
| 4 | 815 | 880 | 921 |
You have decided to use a multiplicative seasonal model with seasonal index.
What is the value of the seasonal index for quarter 2?
Use at least 4 decimals.
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