which of the following method is used for diagnostic test of ARIMA model
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Rules for identifying ARIMA models. General seasonal models: ARIMA (0,1,1)x(0,1,1) etc. Identifying the order of differencing and the constant: Rule 1: If the series has positive autocorrelations out to a high number of lags (say, 10 or more), then it probably needs a higher order of differencing.
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