Question: 3. Complete the forecast using WMA model: (10 marks) MONTH SALES 3-month Weighted Error moving Avg. 2-month Weighted Error moving avg Jan 180 Feb. 220

3. Complete the forecast using WMA model: (10 marks) MONTH SALES 3-month Weighted Error moving Avg. 2-month Weighted Error moving avg Jan 180 Feb. 220 Mar 160 Apr. 180 May 200 Jun. 240 Calculate: a. the sales forecast using the following approaches: A 3-month weighted moving average using 0.5, 0.3, and 0.2 A 2-month moving average using 3 and 2 8 marks b. the MAD for each of the two techniques in part a. Which is the best? 2 marks

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