The table below shows the one-year sales data for a certain part. MonthDemandMonthDemandJanuary687July662February599August747March524September748April521October577May685November519June667December742 Compute the one-step-ahead 3-month and 6-month moving-average forecasts for July through December.Compute the MAD for the forecasts obtained in part (a). What effect does increasing N from 3 to 6 have on the forecasts?Use the arithmetic average of the first six months of data as a baseline to initialize the exponential smoothing. Compute the one-step-ahead exponential smoothing forecasts for July through December, assuming α = 0.25.Compare the accuracy of the forecasts obtained in part (c) with the one-step ahead six-month moving-average forecasts obtained in part (a).

Given information: The data presents the sample for the months January through December.

Answered: The table below shows the one-year…

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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The table below shows the one-year sales data for a certain part.

Month	Demand	Month	Demand
January	687	July	662
February	599	August	747
March	524	September	748
April	521	October	577
May	685	November	519
June	667	December	742

Compute the one-step-ahead 3-month and 6-month moving-average forecasts for July through December.
Compute the MAD for the forecasts obtained in part (a). What effect does increasing N from 3 to 6 have on the forecasts?
Use the arithmetic average of the first six months of data as a baseline to initialize the exponential smoothing. Compute the one-step-ahead exponential smoothing forecasts for July through December, assuming α = 0.25.
Compare the accuracy of the forecasts obtained in part (c) with the one-step ahead six-month moving-average forecasts obtained in part (a).

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