Instruction 14-9
the Number of Cases of Merlot Wine Sold

Essay

Instruction 14-9
The number of cases of merlot wine sold by a Barossa Valley Winery in an 8-year period follows.
$$\begin{array} { c c } \text { Year }& \text { Cases of Wine } \\2003 & 270 \\2004& 356 \\2005 & 398 \\ 2006& 456 \\2007 & 358 \\2008 & 500 \\ 2009& 410 \\2010&376\\\end{array}$$
-Referring to Instruction 14-9,plot both the wine sales series and the series of Holt-Winters forecast for 2011 to 2014 using a smoothing constant of 0.2 for both level and trend.