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Total 2 documents matching your query.

1. ) (score: 1)
Author: Paul von Hippel <von-hippel.1@osu.edu>
Date: Tue, 06 Jan 2004 22:27:35 -0500
I am fitting 3-level linear models to a data set containing about 60,000 test scores nested in 17,000 students nested in 1,000 schools. I am considering introducing a 4th level (teachers or classroom
/archives/html/s-news/2004-01/msg00021.html (7,104 bytes)

2. s (score: 1)
Author: Douglas Bates <bates@stat.wisc.edu>
Date: 13 Jan 2004 07:30:54 -0600
Probably not. The computational methods in the lme function are optimized for strictly nested grouping factors. In an observational data set of this size it is unlikely that strict nesting will hold,
/archives/html/s-news/2004-01/msg00052.html (9,981 bytes)


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