Considere el proceso ARIMA(1,1,2) descrito por $(1 - 0.4B)\nabla z_t = (1 + 0.5B - 0.14B^2)a_t$ Para los siguientes procesos, diga si son estacionarios y/o invertibles (justificar respuesta): $\bullet z_t$ $\bullet \nabla z_t$ $\bullet \nabla^2 z_t$ $\bullet \frac{1}{2}\nabla z_t + \frac{1}{2}\nabla z_{t-1}$
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Step 1: The process is ARIMA(1,1,2) which means it has one autoregressive term, one integrated term, and two moving average terms. Show more…
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