Question: QUESTION THREE [25] The following table represents the 2020 forecast for Ndimanes Manufacturing: Month Actual Sales 2020 Forecast 2021 May 100 105 June 80 July
QUESTION THREE [25]
The following table represents the 2020 forecast for Ndimanes Manufacturing:
| Month | Actual Sales 2020 | Forecast 2021 |
| May | 100 | 105 |
| June | 80 |
|
| July | 110 |
|
| August | 115 |
|
| September | 105 |
|
| October | 110 |
|
| November | 125 |
|
| December | 120 |
|
|
|
|
|
3.1 Calculate the 2021 forecast for the months of June to December using the exponential smoothing method with a smoothing constant of = 0.2. (10)
3.2 Calculate the Mean Absolute Deviation (MAD) (8)
3.2 Compute the Mean Absolute Percentage Error (MAPE) (7)
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