This problem uses the Oxboys data in the nlme
package. You can load this file using the command
> data(Oxboys,package="nlme")
The Oxboys data frame has 234 rows and 4 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.
Analyze these data using lmer in the lme4 package in
a manner similar to the sleep data handout in class.