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Analysis of residual distribution of the S‐ARIMA model; S‐ARIMA was estimated using the following parameters: (p = 0, I = 0, q = 3) for the main model and (p = 1, I = 0, q = 0) for the seasonal component, where p indicates the order of the AR component, q indicates the order of the MA component, and I indicates the order of integration.
