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Question
The department manager using a combination of methods has forecast sales of toasters at a local department store. Calculate the MAD for the manager's forecast. Compare the manager's forecast against a naive forecast covering the same time period. Which is better?
| Month | Unit Sales | Manager's Forecast |
| January | 52 | |
| February | 61 | |
| March | 73 | |
| April | 79 | |
| May | 66 | |
| June | 51 | |
| July | 47 | 50 |
| August | 44 | 55 |
| September | 30 | 52 |
| October | 55 | 42 |
| November | 74 | 60 |
| December | 125 | 75 |
Answer
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