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I have a particular data set where there is strong seasonality, and possibly a trend or non-stationarity. The seasonal decomposition looks as follows:enter image description here

I am a bit confused as to what the order should be in which I perform my tests. First, I do believe I should perform an ADF test on the deseasoned data. But then I don't know which version to use, the one that takes into account a trend, or the one that doesn't.

Could someone please explain this to me?

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