curve fitting

[somsankarsen]

I've a monthly data set starting from march 1995 to feb 2005. how could
I fit varios liner and non liner trend lines by SPSS10 and judg which
one is the most appropriate statistically?

 

[Mike Middleton]

somsankarsen -

You posted a message about SPSS in an Excel newsgroup. If you want to use
Excel, the Add Trendline feature includes linear and several nonlinear
options. If you want to examine seasonality, you could use Excel's
Regression tool. For more guidance using Excel, my book, "Data Analysis
Using Microsoft Excel: Updated for Office XP," has chapters on simple linear
regression, nonlinear regression, multiple regression, and time series
seasonality (including seasonal indicators, autoregression, and classical
time series decomposition). And, Tushar Mehta's web site has instructions
about using Excel for curve fitting at
http://www.tushar-mehta.com/excel

- Mike
www.mikemiddleton.com