(b) Describe the important characteristics of the partial autocorrelation function (PACF) for the following models: (i)
Posted: Sun Jul 10, 2022 10:10 am
(b) Describe the important characteristics of the partial autocorrelation function (PACF) for the following models: (i) MA(2), (ii) IMA(2,1), (iii) AR(2), (iv) ARI(1,2), and (v) ARIMA(1,1,2). (5 marks) (c) Write down the mathematical expression representing each of the models for (i) to (v) in (b) above.