Answered: Month Demand Month Demand 89 July…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

For the data given, use the arithmetic average of the first six months of data as a baseline to initialize the exponential smoothing.
a. Determine the one-step-ahead exponential smoothing forecasts for August
through December, assuming a = .20.
b. Compare the accuracy of the forecasts obtained in part (a) with the one-stepahead six-month moving-average forecasts determined in the problem below.
c. Comment on the reasons for the result you obtained in part (b).

Compute the one-step-ahead three-month and six-month moving-average forecasts for July through December. What effect does increasing N from 3 to 6 have on the forecasts?

Month
Demand
Month
Demand
89
July
August
September
October
November
January
223
February
March
57
286
144
212
April
Мay
221
275
177
188
June
280
December
312

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