Question: Use the following sales data (Note: the same data set is provided in the third worksheet of the exam Excel file) to answer the question:

Use the following sales data (Note: the same data

Use the following sales data (Note: the same data set is provided in the third worksheet of the exam Excel file) to answer the question: Demand 380 320 644 685 474 283 547 Quarter-Year Q1-2011 Q2-2011 Q3-2011 Q4-2011 Q1-2012 Q2-2012 Q3-2012 Q4-2012 Q1-2013 Q2-2013 Q3-2013 Q4-2013 Q1-2014 Q2-2014 Q3-2014 Q4-2014 677 435 290 660 709 Please apply Holt-Winter's forecasting method to this data set and answer the following question accordingly (please use the values of alpha [.25), beta [.15] and gamma [.25] provided in the Excel file to answer. HINT: If you implement the calculations correctly, the base level estimate for Q3-2013 should be 509.54. What is the mean error in this case? (consider the customary rule) O 22.6 O 27 O 196.1 O 146

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