In: Statistics and Probability
1.Suppose we expected the third year’s annual demand for answering machines to be 1,200 units, which is 100 per month. We would not forecast each month to have a demand of 100, but we would adjust these based on the seasonal indices as follows.Calculate the seasonal indices.
2) Determine the magnitude of the seasonal ratio of the average quarter centered at that time period.
Quarterly Sales ($1,000,000s) for Turner Industries | ||||
Quarter | Year 1 | Year 2 | Year 3 | Average |
1 | 108 | 116 | 123 | 115.67 |
2 | 125 | 134 | 142 | 133.67 |
3 | 150 | 159 | 168 | 159 |
4 | 141 | 152 | 165 | 152.67 |
Average | 131 | 140.25 | 149.5 | 140.25 |