![SOLVED: Consider an ARIMA model: Zt = 0.2 + 1.72t-1 + 0.42Zt-2 + 0.32t-3 + at + 0.7at-1, where at is a white noise with mean zero and variance 2. It is SOLVED: Consider an ARIMA model: Zt = 0.2 + 1.72t-1 + 0.42Zt-2 + 0.32t-3 + at + 0.7at-1, where at is a white noise with mean zero and variance 2. It is](https://cdn.numerade.com/ask_images/7a5acb14a1674a28b1af68c960f679d5.jpg)
SOLVED: Consider an ARIMA model: Zt = 0.2 + 1.72t-1 + 0.42Zt-2 + 0.32t-3 + at + 0.7at-1, where at is a white noise with mean zero and variance 2. It is
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