Mandible {lmtest} | R Documentation |
Mandible Data.
data(Mandible)
Data from 167 fetuses, especially:
The data was originally published by Chitty et al., 1993, and analysed in
Royston and Altman, 1994 (the data is given there). Only measurments with
age <= 28
were used in this analysis.
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.
data(Mandible) lm(length ~ age, data=Mandible, subset=(age <= 28))