Trend Analysis
For some time series we can use the techniques of simple regression to fit a model that uses time as the X variable to describe or predict the general trend of Y. In the current example we have seen that although there is clearly some irregular variation and sign of season and cycle, the production of basic goods in India has followed a steady upward trend in the years represented in our data table.
For simplicity of interpretation, we'll use the column called Month#, which starts at 1 in the first month and runs for 114 months. We can fit the model using the observed 114 months, and generate forecasts simply by extrapolating a straight line.
Select Analyze → Fit Y by X. Cast BasicGoods as Y and Month# as X.
In the report window, ...
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