Question: Select which type(s) of differencing this ACF plot suggests the model will need 1.0 0.5 ACF 0.0 -0.5 -1.0 1 6 12 18 24 30

Select which type(s) of differencing this ACF plot suggests the model will need 1.0 0.5 ACF 0.0 -0.5 -1.0 1 6 12 18 24 30 36 Lag Regular difference Seasonal difference None (the process is already stationary)

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