lmtest (version 0.9-40)

Mandible: Mandible Data

Description

Mandible Data.

Usage

data(Mandible)

Format

Data from 167 fetuses, especially:

age

gestational age in weeks.

length

mandible length in mm.

References

L. S. Chitty and S. Campbell and D. G. Altman (1993), Measurement of the fetal mandible -- feasibility and construction of a centile chart., Prenatal Diagnosis, 13, 749--756.

P. Royston and D. G. Altman (1994), Regression Using Fractional Polynomials of Continuous Covariates: Parsimonious Parametric Modelling. Applied Statistics, 43, 429--453.

Examples

# NOT RUN {
data(Mandible)
lm(length ~ age, data=Mandible, subset=(age <= 28))

# }