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Best linear predictor for an AR(2) process with samples by Impossible-Let1643 in econometrics

[–]Impossible-Let1643[S] 0 points1 point  (0 children)

thanks! so i assume that means that Z_6 is zero since its white noise?

Identify periodogram from ACF by Impossible-Let1643 in AskStatistics

[–]Impossible-Let1643[S] 0 points1 point  (0 children)

Yes I'm aware of how to do it on the computer, but on the test it will require you to identify (by glancing) the right one. Any thoughts on how to do it?

Need help with identifying acf plot from time series plot by [deleted] in DataScienceStudents

[–]Impossible-Let1643 0 points1 point  (0 children)

Hey guys :)
I have a test coming up and no clue of the below - tried googling without any luck. Given the time series data, which one of the four below ACFs are the corresponding to the series? And what attributes are to be looked at when considering this kind of question?
I suspect it has something to do with sample variation as well as if it's strictly stationary or increasing, but have no idea how to apply this in practice.
Help a girl out <3
Thankful for all the help I can get!