Calculate mean absolute deviation

Reference no: EM13130688

Considering the following data using weighted moving average (4 quarters; 0.4, 0.3, 0.2, and 0.1; where 0.5 is the weight for the most recent quarter)Calculate Mean Absolute Deviation (MAD)

Year Q1 Q2 Q3 Q4
2008 - 810 900 740
2009 890 960 1040 800
2010 1050 1120 1250 1010

Reference no: EM13130688

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