I have three time series that I have differenced with the order of 1 to achieve stationarity. Based on these ACF and PACF plots, what would be the values of p and q in the ARIMA model for each time series? How are they determined? enter image description here

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  • $\begingroup$ You need to tell us some context & details, is this a monthly series? There are many similar posts, stats.stackexchange.com/questions/134487/… and this list. Are the blue bands confidence bands? How calculated? (We dont want to guess!). If so, most values are inside band, and no discernible pattern. Maybe low-order ARMA, like AR(1)? $\endgroup$ – kjetil b halvorsen Feb 20 at 0:49

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