For a series of length 64, the sample partial autocorrelations are given as: Lag 1 2 3 4 5 PACF…
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6.16 For a series of length 64, the sample partial autocorrelations are given as:
Which models should we consider in this case?
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Technifi Expert’s Answer:
We know that PACF of pure Auto-regressive model of order P , falls to zero after p lags , from that we can start by fitting AR(3) but only using PACF we can not conclude anything , we have to look at ACF also to get the clear idea , because the process can also follow ARMA model. If you only have sample PACF the AR(3) is the starting model.
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