The number of major plumbing repair jobs performed by Augur’s Plumbing Service in each of the last six months is listed below.   Month                                Jobs      October                                92 November                            94 December                            98 January                                 95 February                               99 March                                  104        Use the ‘textbook’ naïve method to forecast April jobs (Ft+1 = Xt + (Xt – Xt-1). Use the three- period moving average to forecast jobs in April Based upon the MAD (mean absolute deviation), determine whether the three-period moving average or textbook naïve method is more accurate, based upon forecasts for January through March.

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter13: Regression And Forecasting Models
Section: Chapter Questions
Problem 42P: The file P13_42.xlsx contains monthly data on consumer revolving credit (in millions of dollars)...
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  1. Naïve method versus three period Moving Average

The number of major plumbing repair jobs performed by Augur’s Plumbing Service in each of the last six months is listed below.

 

Month                                Jobs     

October                                92

November                            94

December                            98

January                                 95

February                               99

March                                  104     

 

  1. Use the ‘textbook’ naïve method to forecast April jobs (Ft+1 = Xt + (Xt – Xt-1).
  2. Use the three- period moving average to forecast jobs in April
  3. Based upon the MAD (mean absolute deviation), determine whether the three-period moving average or textbook naïve method is more accurate, based upon forecasts for January through March.
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