Data Preparation: Homogeneity
[April 11,2012] This week, we unveil the third issue in our ongoing series of tutorials on data preparation. This time, our focus is another bedrock assumption in time series modeling: homogeneity, or the assumption that a time series sample is drawn from a stable/homogeneous process.
We start by laying out a workable definition of a homogeneous stochastic process, then running through the minimum requirements for time series analysis. Then we'lli use sample data drawn from our previous tutorials to draw a few observations about homogeneity and examine the underlying assumptions behind them.
You can find more details and a step-by-step tutorial, along with a downloadable spreadsheet and PDF, at the link below:
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