I hope someone can help or direct me somewhere useful
I have a table from SPSS Time Series Analysis -version 16. I can confirm the periodicity of the data is 12 as it is monthly.
I have an ARIMA model with Seasonal Differencing. It says 1 under the estimate heading i.e. one degree of seasonal differencing. But what does a figure of 6 mean earlier in the row?
There is another row with similar information at the end which refers to a significant intervention variable. Again, what does a 10 mean here?
Excuse ignorance
Dr David Pitfield AcSS
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