Using global market-level data for desktop computers, select two forecasting methods that use past sales; predict sales annually for years 2000 though 2006. How do the two methods compare? Is one better than another? Why? How does your accuracy compare with the laptop computer predictions in the chapter? Are the accuracy levels different? Why?

Year Actual Sales (000s) 1995 50,003 1996 59,461 1997 68,496 1998 79,577 1999 98,541 2000 111,163 2001 104,366 2002 104,101 2003 111,570 2004 124,608 2005 136,104 2006 138,528