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st: Help with Principal Components


From   Belen Dias <belendp9@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Help with Principal Components
Date   Mon, 11 Feb 2008 16:22:12 -0800 (PST)

Hi,

Me and a friend are using principal components to make
an index comprising 8 different variables (we're
basically using the first principal component as my
index). I have a two-part question. 

1. How do I obtain the weights assigned to each
variable? 

2. Can we obtain the standard errors of the
predicted values after using -factor, pcf- ? My friend
says that we can get standard errors in principal
components analysis, I say that, being PCA a
transformational procedure, there's no model and
therefore no errors. Who's right?

Best regards,
BElen




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