Question: Consider the model ( 1 0 . 4 3 B ) ( 1 B ) Z t = a t and the observations Z 4
Consider the model
(10.43B)(1B)Zt=at
and the observations Z49=33.4,Z50=33.9 and a2=2 .
- (a) Compute the forecast Z50(l), for l=1,2,3 and their 90% forecast limits
- (b) What is the eventual forecast function for the forecasts made at time, t = 50?
- (c) At time t=51,Z51 became known and equaled 34.1. Update the forecasts obtained in part (a)
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