Chem97 {lme4} | R Documentation |
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.
data(Chem97)
A data frame with 31022 observations on the following 8 variables.
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.
http://multilevel.ioe.ac.uk/softrev/chem97.html
Yang, M., Fielding, A. and Goldstein, H. (2002). Multilevel ordinal models for examination grades (submitted to Statistical Modelling).
data(Chem97) str(Chem97) summary(Chem97) fm1 <- lme(score ~ 1, data = Chem97, random = ~ 1 | lea/school) summary(fm1) fm2 <- lme(score ~ gcsecnt, data = Chem97, random = ~ 1 | lea/school) summary(fm2)