Box-Jenkins(ARIMa) Models (3)Autoregressive-moving average model of order p and g (arma(p, q) y=6+y=1+n2y2+…+yp +E.-6 t-1 g t-g . e, y, depends on its p previous values and q previous random error terms4 Box-Jenkins (ARIMA) Models (3) Autoregressive-moving average model of order p and q (ARMA(p,q)) i.e., yt depends on its p previous values and q previous random error terms , 1 1 2 2 1 1 2 2 t t t q t q t t t p t p y y y y − − − − − − + − − − − = + + + +             