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Question 4 (a)For the data below: Month Automobile battery sales Month Automobile battery sales Jan 2013 20 July 17 Feb 21 August 18 Mar 15

Question 4

(a)For the data below:

Month Automobile battery sales Month Automobile battery sales

Jan 2013 20 July 17

Feb 21 August 18

Mar 15 Sept 20

April 14 Oct 20

May 13 Nov 21

June 16 Dec 23

i.Forecast the Jan 2014 by developing a three-month moving average and weight moving average (3, 2, 1). (20m)

ii.Computed MAD and MAPE which one is the best forecast?(5m)

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