Question

Asked Nov 11, 2019

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In question 7, you used exponential smoothing to forecast week 20. For the same data set with the same value of alpha, perform error analysis. What is the value of the MAD (mean absolute deviation) rounded to two decimal places? alpha = 0.1

week | Sales (1000s of gallons) |

1 | 17 |

2 | 21 |

3 | 19 |

4 | 23 |

5 | 18 |

6 | 16 |

7 | 20 |

8 | 18 |

9 | 22 |

10 | 20 |

11 | 15 |

12 | 22 |

13 | 31 |

14 | 34 |

15 | 31 |

16 | 33 |

17 | 28 |

18 | 32 |

19 | 30 |

Step 1

Step by step procedure to obtain the value of MAD using MINITAB software is given below:

Step 1: Choose **Stat > Time Series > Single Exp Smoothing**.

Step 2: In **Variable**, enter the column Sales (1000s of gallons).

Step 3: Check to **gen...**

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