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 = 0.1weekSales (1000s of gallons)1172213194235186167208189221020111512221331143415311633172818321930

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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
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Expert Answer

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...

Single Exponential Smoothing for Sales (1000s of gallons)
Method
Sales (1000s of gallons)
Data
Length 19
Smoothing Constant
а 01
Accuracy Measures
МАРЕ 17.6727
MAD
4.6561
MSD 36.8860
Forecasts
Period Forecast
Lower
Upper
20
25.4285
14.0213
36.8356
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Single Exponential Smoothing for Sales (1000s of gallons) Method Sales (1000s of gallons) Data Length 19 Smoothing Constant а 01 Accuracy Measures МАРЕ 17.6727 MAD 4.6561 MSD 36.8860 Forecasts Period Forecast Lower Upper 20 25.4285 14.0213 36.8356

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