Using simple exponential smoothing and the following time series data, respond to each of the items.   Period Demand 1 72 2 60 3 27 4 52 5 26 6 46 7 52 8 28 9 53 10 50 11 57 12 87 13 22 14 56

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Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
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Chapter2: Exponential, Logarithmic, And Trigonometric Functions
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Using simple exponential smoothing and the following time series data, respond to each of the items.
 

Period Demand
1 72
2 60
3 27
4 52
5 26
6 46
7 52
8 28
9 53
10 50
11 57
12 87
13 22
14 56

I need help! Please explain, thanks.

b. Compute all possible forecasts using a smoothing coefficient (a) of 0.4. (Negative amounts should be indicated by a minus sign.
Round your answers to 2 decimal places.)
Exponential
Smooth
Absolute Error
Period
Demand
Error
1
72
0.00
0.00
2
60
72.00
(12.00)
27
67.20
4
52
26
46
7
52
8
28
46.70
53
10
50
11
57
12
87
50.90
13
22
14
56
15
c. Compute all possible forecasts using a smoothing coefficient (a) of 0.9. (Negative amounts should be indicated by a minus sign.
Round your answers to 2 decimal places.)
Exponential
Smooth
Period
Demand
Error
Absolute Error
1
72
60
3
27
4
52
26
6
46
7
52
28
53
10
50
11
57
12
87
13
22
14
56
15
Transcribed Image Text:b. Compute all possible forecasts using a smoothing coefficient (a) of 0.4. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.) Exponential Smooth Absolute Error Period Demand Error 1 72 0.00 0.00 2 60 72.00 (12.00) 27 67.20 4 52 26 46 7 52 8 28 46.70 53 10 50 11 57 12 87 50.90 13 22 14 56 15 c. Compute all possible forecasts using a smoothing coefficient (a) of 0.9. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.) Exponential Smooth Period Demand Error Absolute Error 1 72 60 3 27 4 52 26 6 46 7 52 28 53 10 50 11 57 12 87 13 22 14 56 15
d. Compute the MADS for each exponential smoothing forecast. (Round your answers to 2 decimal places.)
Average Forecast
For an alpha of 0.4, the MAD
For an alpha of 0.9, the MAD
e. Which forecast model would you choose? Why?
The forecast using the smoothing coefficient (a) of
model is to be chosen because it has a
measure of error (MAD).
Transcribed Image Text:d. Compute the MADS for each exponential smoothing forecast. (Round your answers to 2 decimal places.) Average Forecast For an alpha of 0.4, the MAD For an alpha of 0.9, the MAD e. Which forecast model would you choose? Why? The forecast using the smoothing coefficient (a) of model is to be chosen because it has a measure of error (MAD).
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