Refer to the gasoline sales time series data in the given table. Week Sales (1,000s of gallons) 1 18 2 22 3 15 4 26 5 18 6 17 7 21 8 19 9 22 10 18 11 17 12 21 (a) Compute four-week and five-week...











Refer to the gasoline sales time series data in the given table.



























































Week

Sales (1,000s of gallons)
118
222
315
426
518
617
721
819
922
1018
1117
1221



















































(a)
Compute four-week and five-week moving averages for the time series.
If required, round your answers to two decimal places.





















































































Week




Sales


4 Period
Moving Average


5 period
Moving Average

118
222
315
426
518
617
721
819
922
1018
1117
1221


(b)
Compute the MSE for the four-week and five-week moving average forecasts.
If required, round your final answers to three decimal places.
MSE for four-week moving average =
MSE for five-week moving average =

(c)
What appears to be the best number of weeks of past data (three, four, or five) to use in the moving average computation? Consider that the MSE for the three-week moving average is 11.407.







Jun 07, 2022
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