Bronchopulmonary dysplasia data

Description

The bpd data frame has data on 223 human babies.

Usage

data(bpd)

Format

This data frame contains the following columns:

birthweight

birthweight of baby (grammes).

BPD

an indicator of presence of bronchopulmonary dysplasia (BPD): 0=absent, 1=present.

Source

Pagano, M. and Gauvreau, K. (1993). Principles of Biostatistics. Duxbury Press.

References

Ruppert, D., Wand, M.P. and Carroll, R.J. (2003)
Semiparametric Regression Cambridge University Press.
http://stat.tamu.edu/~carroll/semiregbook/

Examples

library(SemiPar)
data(bpd)
attach(bpd)
plot(birthweight,BPD)
boxplot(split(birthweight,BPD),col="green")