bdf {nlme} | 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 `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

### References

Snijders, Tom and Bosker, Roel (1999), Multilevel Analysis: An Introduction to Basic and Advanced Multilevel Modeling, Sage.

### Examples

    summary(bdf)

[Package nlme version 3.1-104 Index]