Last week’s sales of iMac computers at an Apple Store in Oklahoma City, OK, are shown in the following table:
lerrmaLast week’s sales of iMac computers at an Apple Store in Oklahoma City, OK, are shown in the following table:
Day | Sales (Dollars) |
1 | 180 |
2 | 150 |
3 | 210 |
4 | 225 |
5 | 195 |
6 | 190 |
7 | 230 |
(a) Use the 3-day moving average method for forecasting days 4–7.
(b) Use the 3-day weighted moving average method for forecasting days 4–7. Use Weight 1 day ago = 2, Weight 2 days ago = 4, and Weight 3 days ago = 3.
(c) Compare the techniques using the mean absolute deviation (MAD).
12 years ago
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