Data Sets: Birthweight Data
The file home/heckman/public_html/data/birthweights/data.txt contains
column 1 = proportion of male infants that survived to 28 days
column 2 = standardized gestation time (days)
column 3 = standardized infant birthweight (pounds)
column 4 = the number of infants falling in the particular
To read into Splus:
temp <- matrix(scan("/home/heckman/public_html/data/birthweights.data.txt"),362,4,byrow=T)
Birthweights were rounded off to nearest half-pound in original paper.
One outlier (13 lbs) was deleted from this data set.
This file represents 7036 individuals.
Data are from Karn and Penrose (1951), "Birth weight and gestation
time in relation to maternal age, parity and infant survival",
Annals of Eugenics, 16, 147-164.