Chem97

0th

Percentile

Scores on A-level Chemistry in 1997

Scores on the 1997 A-level Chemistry examination in Britain. Students are grouped into schools within local education authories. In addition some demographic and pre-test information is provided.

Keywords
datasets
Usage
data(Chem97)
Details

This data set is relatively large with 31,022 individuals in 2,280 schools. Note that while this is used, illustratively, to fit Normal response models, the distribution of the response is not well described by a Normal distribution.

Format

A data frame with 31022 observations on the following 8 variables.

lea
Local Education Authority - a factor
school
School identifier - a factor
student
Student identifier - a factor
score
Point score on A-level Chemistry in 1997
gender
Student's gender
age
Age in month, centred at 222 months or 18.5 years
gcsescore
Average GCSE score of individual.
gcsecnt
Average GCSE score of individual, centered at mean.

Source

http://multilevel.ioe.ac.uk/softrev/chem97.html

References

Yang, M., Fielding, A. and Goldstein, H. (2002). Multilevel ordinal models for examination grades (submitted to Statistical Modelling).

Aliases
  • Chem97
Examples
str(Chem97)
summary(Chem97)
(fm1 <- lmer(score ~ (1|school) + (1|lea), Chem97))
(fm2 <- lmer(score ~ gcsecnt + (1|school) + (1|lea), Chem97))
Documentation reproduced from package mlmRev, version 1.0-6, License: GPL (>= 2)

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