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Additive or Multiplicative Terms in ETS tool

Gualigee
8 - Asteroid

Sometimes, it’s not immediately obvious from the decomposition plot how best to apply the error, trend, and seasonal components. For instance, how do I determine additive or multiplicative for error according to the chart below? Thanks, 

搜狗截图20211201213536.png

2 REPLIES 2
Gualigee
8 - Asteroid

 The peaks and valleys for seasonality are constant over time, I should apply it additively, right?

搜狗截图20211217061220.png

OllieClarke
15 - Aurora
15 - Aurora

@Gualigee I'd agree and say additive here

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