Consider the following data:
YEAR SALES
2000 900
2001 1400
2002 1750
2003 1900
2004 1700
2005 1500
2006 2000
2007 1950
2008 2250
2009 2300
Suppose you wished to forecast sales for 2010. At first glance, which time-series forecasting method would you suggest are appropriate for this date?
Compute the forecast sales for 2010 using:
a. Simple Average
b. 3-year Weighted Average
c. 5-year Weighted Average
d. 3-year Exponentially Smoothed Weighted Average (using the weight factors and formula found on page 131- 1/6 , 1/3, and ½ for the 3 most recent years)
e. If actual sales for 2010 were 2500 units, which forecasting technique was more accurate?