Refer to the gasoline sales time series data in the given table. Week Sales (1,000s of gallons) 1 17 2 23 3 14 4 25 5 17 6 16 7 22 8 19 9 21 10 19 11 17 12 23 (a) Compute four-week and five-week moving averages for the time series. Do not round intermediate calculations. If required, round your answers to two decimal places. Week Sales 4-Week Moving Average 5-Week Moving Average 1 17 2 23 3 14 4 25 5 17 6 16 7 22 8 19 9 21 10 19 11 17 12 23 (b) Compute the MSE for the four-week and five-week moving average forecasts. Do not round intermediate calculations. If required, round your 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? Consider that the MSE for the three-week moving average is 11.889.
Refer to the gasoline sales time series data in the given table. Week Sales (1,000s of gallons) 1 17 2 23 3 14 4 25 5 17 6 16 7 22 8 19 9 21 10 19 11 17 12 23 (a) Compute four-week and five-week moving averages for the time series. Do not round intermediate calculations. If required, round your answers to two decimal places. Week Sales 4-Week Moving Average 5-Week Moving Average 1 17 2 23 3 14 4 25 5 17 6 16 7 22 8 19 9 21 10 19 11 17 12 23 (b) Compute the MSE for the four-week and five-week moving average forecasts. Do not round intermediate calculations. If required, round your 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? Consider that the MSE for the three-week moving average is 11.889.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Refer to the gasoline sales time series data in the given table.
| Week | Sales (1,000s of gallons) |
| 1 | 17 |
| 2 | 23 |
| 3 | 14 |
| 4 | 25 |
| 5 | 17 |
| 6 | 16 |
| 7 | 22 |
| 8 | 19 |
| 9 | 21 |
| 10 | 19 |
| 11 | 17 |
| 12 | 23 |
| (a) | Compute four-week and five-week moving averages for the time series. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Do not round intermediate calculations. If required, round your answers to two decimal places. | |||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||
| (b) | Compute the MSE for the four-week and five-week moving average forecasts. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Do not round intermediate calculations. If required, round your 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? Consider that the MSE for the three-week moving average is 11.889. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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