Popularly known as the Law of iterated expectations (LIE) in econometrics, aka Law of Total Expectations, Double expectation formula - , this important theorem is explained and proved for continuous and discrete cases.
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https://www.youtube.com/watch?v=fJCsEDdc-74
Multicollinearity is an issue that may arise in multiple regression. Here we talk about
what is multicollinearity
why it is a concern
how to detect it
ways on dealing with it
Visit me at: http://www.statisticsmentor.com
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https://www.youtube.com/watch?v=wFLaKiiLauI
Subject: statistics
Level: Post newbie
Description: ok, so admit it. You hate integration. Hey, so do I. But there are times when we can easily find a nasty looking integration that would require iterated applications of integration by parts in one step! ;)
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https://www.youtube.com/watch?v=k0WljyJRDao
How to get a partial regression plot in SPSS for multiple regression. This accompanies the presentation on the added variable plot:
https://youtu.be/z0OXMMFVyGQ
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https://www.youtube.com/watch?v=ooM-Ny4X2Hc
I show you the proof. It's quite a long video as I take my sweet time over things. Can't believe it took over 20mins - wouldnt have that kind of time in class.
I kinda like this proof cuz it revisits some of the techniques I have shown in previous videos.
The hardest bit about the proof is dealing with double summation, and that's what makes this video long. If you already have watched my video on doing double summation in 7mins, then you only need to watch parts 1 and 2 of this video.
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https://www.youtube.com/watch?v=4Zmhe45EHCI
Econometrics/statistics questions and answers
1:00 components of X'X (Gram) matrix
5:25 Gauss Jordan elimination using row operations
10:53 Method of cofactors
18:41 Comparing the 2 methods for finding inverses of a square matrix
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https://www.youtube.com/watch?v=obyH0y42wY4
Subject: Statistics/econometrics
Level: technical
Hat matrix in bivariate regression - question from a student
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https://www.youtube.com/watch?v=AjDJo-l-8Ko