Question: Problem 15-07 (Algorithmic) Refer to the gasoline sales time series data in the given table. Week Sales (1000s of gallons) 1 1 18 2 21

Problem 15-07 (Algorithmic) Refer to the gasoline

Problem 15-07 (Algorithmic) Refer to the gasoline sales time series data in the given table. Week Sales (1000s of gallons) 1 1 18 2 21 3 19 4 22 5 18 6 16 7 22 8 18 9 23 10 20 11 16 12 23 a. Compute four-week and five-week moving averages for the time series. Round your answers to two decimal places. 4-Week 5-Week 5 Moving Average Moving Average Week Sales 1 18 2 21 3 19 4 22 5 18 6 16 7 22 8 18 9 23 10 20 11 16 12 23 b. Compute the MSE for the four-week and five-week moving average forecasts. Round your intermediate calculations and final answers to two 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? Recall that MSE for the three-week moving average is 9.87

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