Birthweights and Survival Proportions

Description

The KarnPenrose data frame has 25 triples from a 1935-1946 British study on infant health.

Usage

data(KarnPenrose)

Format

The data frame contains the following columns:

birthweight

birthweight of infant in pounds.

numBirths

number of infants born with the corresponding (rounded) birth weight.

numSurvived

number of those infants that survived more than 28 days beyond birth.

Source

Karn, S. and Penrose, L.S. (1951). Birth weight and gestation time in relation to maternal age, parity and infant survival. Annals of Eugenics, 16, 147-164.

Examples

data(KarnPenrose)
plot(KarnPenrose$birthWeight,KarnPenrose$numSurvived/KarnPenrose$numBirths,
     xlab = "birthweight",ylab = "proportion of survivals after 28 days")