Oxboys  R Documentation 
Heights of Boys in Oxford
Description
The Oxboys
data frame has 234 rows and 4 columns.
Format
This data frame contains the following columns:
 Subject

an ordered factor giving a unique identifier for each boy in the experiment
 age

a numeric vector giving the standardized age (dimensionless)
 height

a numeric vector giving the height of the boy (cm)
 Occasion

an ordered factor  the result of converting
age
from a continuous variable to a count so these slightly unbalanced data can be analyzed as balanced.
Details
These data are described in Goldstein (1987) as data on the height of a selection of boys from Oxford, England versus a standardized age.
Source
Pinheiro, J. C. and Bates, D. M. (2000), MixedEffects Models in S and SPLUS, Springer, New York. (Appendix A.19)