a) Show the expression to calculate the missing forecasts from each forecasting technique. ompany. (Weighted moving average parameters are n=3 and W₁1:0.4, We-2-0.3; Wea=0.3; smoothing factor(alfa) for exponential smoothing is 0.3)
a) Show the expression to calculate the missing forecasts from each forecasting technique. ompany. (Weighted moving average parameters are n=3 and W₁1:0.4, We-2-0.3; Wea=0.3; smoothing factor(alfa) for exponential smoothing is 0.3)
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter13: Regression And Forecasting Models
Section13.6: Moving Averages Models
Problem 22P: The file P13_22.xlsx contains total monthly U.S. retail sales data. While holding out the final six...
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![17. Following tables are created in order to generate forecasts using weighted moving average and
simple moving average for the sales amount of a certain product group at an electronics company.
a) Show the expression to calculate the missing forecasts from each forecasting technique.
(Weighted moving average parameters are n=3 and w+1:0.4, We-2-0.3; W=0.3; smoothing
factor(alfa) for exponential smoothing is 0.3)
1 Exponential Smooting Table
Period
1
2
3
4
2 Weighted Average Forecasts
Period
1
2
3
4
Actual
335
246
279
263
MAD
Actual
335
246
279
263
Forecast
193,0
205,3
229,2
?
Forecast
293,2
304,7
272,1
?
Error
141,9
40,6
49,75
?
Error
41,8
-58,7
6,9
?
b) Show the expression to calculate mean absolute deviation (MAD) for the forecasting results of
these two techniques separately.
ΣActual - Forecast
n](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2a6a9d38-4b4f-4f2c-9679-693ca0ee6d08%2F2a9afea5-5cd8-42db-8070-4945e887e6be%2Fughvo2y_processed.png&w=3840&q=75)
Transcribed Image Text:17. Following tables are created in order to generate forecasts using weighted moving average and
simple moving average for the sales amount of a certain product group at an electronics company.
a) Show the expression to calculate the missing forecasts from each forecasting technique.
(Weighted moving average parameters are n=3 and w+1:0.4, We-2-0.3; W=0.3; smoothing
factor(alfa) for exponential smoothing is 0.3)
1 Exponential Smooting Table
Period
1
2
3
4
2 Weighted Average Forecasts
Period
1
2
3
4
Actual
335
246
279
263
MAD
Actual
335
246
279
263
Forecast
193,0
205,3
229,2
?
Forecast
293,2
304,7
272,1
?
Error
141,9
40,6
49,75
?
Error
41,8
-58,7
6,9
?
b) Show the expression to calculate mean absolute deviation (MAD) for the forecasting results of
these two techniques separately.
ΣActual - Forecast
n
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