| bdf | R Documentation |
Language scores
Description
The bdf data frame has 2287 rows and 25 columns of language
scores from grade 8 pupils in elementary schools in The Netherlands.
Usage
data(bdf)Format
- schoolNR
a factor denoting the school.
- pupilNR
a factor denoting the pupil.
- IQ.verb
a numeric vector of verbal IQ scores
- IQ.perf
a numeric vector of IQ scores.
- sex
Sex of the student.
- Minority
a factor indicating if the student is a member of a minority group.
- repeatgr
an ordered factor indicating if one or more grades have been repeated.
- aritPRET
a numeric vector
- classNR
a numeric vector
- aritPOST
a numeric vector
- langPRET
a numeric vector
- langPOST
a numeric vector
- ses
a numeric vector of socioeconomic status indicators.
- denomina
a factor indicating of the school is a public school, a Protestant private school, a Catholic private school, or a non-denominational private school.
- schoolSES
a numeric vector
- satiprin
a numeric vector
- natitest
a factor with levels
0and1- meetings
a numeric vector
- currmeet
a numeric vector
- mixedgra
a factor indicating if the class is a mixed-grade class.
- percmino
a numeric vector
- aritdiff
a numeric vector
- homework
a numeric vector
- classsiz
a numeric vector
- groupsiz
a numeric vector
Source
‘http://stat.gamma.rug.nl/snijders/multilevel.htm’, the first edition of http://www.stats.ox.ac.uk/~snijders/mlbook.htm.
References
Snijders, Tom and Bosker, Roel (1999), Multilevel Analysis: An Introduction to Basic and Advanced Multilevel Modeling, Sage.
Examples
summary(bdf)
## More examples, including lme() fits reproducing parts in the above
## book, are available in the R script files
system.file("mlbook", "ch04.R", package ="nlme") # and
system.file("mlbook", "ch05.R", package ="nlme")