Answered: Complete the Mean Absolute Deviation…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter13: Regression And Forecasting Models

Section13.6: Moving Averages Models

Problem 22P: The file P13_22.xlsx contains total monthly U.S. retail sales data. While holding out the final six...

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Question

Below is the actual demand for electrical boxes for Abco Electric for the last nine periods along with a forecast. A) Complete the Mean Absolute Deviation for this forecast. B) Complete an additional forecast for periods 4-12 using a weighted moving average of your choice. Change the title to describe your method. C) Calculate the MAD for your forecast. D) In the text box below put your comment comparing the accuracy of your forecast versus the one given in A. Was your method more accurate? Why or why not? Use whole numbers for all forecasts. Use ONE decimal place for the MAD calculations.

Period	Demand	Naïve Method	Error (e)	MAD	Your Title here	Your MAD
1	855			Abs e		Abs e
2	910
3	930
4	890	930
5	935	890
6	980	935
7	1020	980
8	960	1020
9	905	960
10	895	905
11	955	895
12	820	955
MAD

D. Your comment on Forecast Accuracy:

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