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\name{down}
\alias{down}
\docType{data}
\title{ Down syndrome in babies}
\description{
The \code{down} data frame has 30 rows and 3 columns.
Variable \code{cases} means the number of babies with Down syndrome out of total number of births
\code{births} for mothers with mean age \code{age}.
}
\usage{data(down)}
\format{
A data frame with 30 observations on the following 3 variables.
\describe{
\item{\code{age}}{the mothers' mean age.}
\item{\code{births}}{count of total births.}
\item{\code{cases}}{count of babies with Down syndrome.}
}
}
%\details{
% ~~ If necessary, more details than the description above ~~
%}
\source{
Davison, A.C. and Hinkley, D. V. (1997) \emph{Bootstrap Methods
and their Application}. Cambridge University Press.
}
\references{
Geyer, C. J. (1991) Constrained maximum likelihood exemplified by isotonic
convex logistic regression. \emph{Journal of the American Statistical Association}
\bold{86}, 717--724.
}
\examples{
data(down)
}
\keyword{datasets}
|
