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 0 and 1

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")