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\name{penny}
\alias{penny}
\title{Thickness of US Lincoln Pennies}
\description{
Thickness of US Lincoln pennies minted during years 1945 through
1989.
}
\usage{data(nox)}
\format{
A data frame containing 90 observations on the following variables.
\tabular{ll}{
\code{year} \tab Year minted.\cr
\code{mil} \tab Thickness in mils.
}
}
\source{
Scott, D. W. (1992), \emph{Multivariate Density Estimation: Theory,
Practice and Visualization}. New York: Wiley.
}
\references{
Gu, C. (1995), Smoothing spline density estimation: Conditional
distribution, \emph{Statistica Sinica}, \bold{5}, 709--726.
Scott, D. W. (1992), \emph{Multivariate Density Estimation: Theory,
Practice and Visualization}. New York: Wiley.
}
\keyword{datasets}
|
