\Header{rotifer}{Numbers of Rotifers by Fluid Density}
\keyword{datasets}{rotifer}
\begin{Description}\relax
The data give the numbers of rotifers falling out of suspension for
different fluid densities. There are two species, \code{pm}
\emph{Polyartha major}
and \code{kc},
\emph{Keratella cochlearis}
and for each species the number falling out and the total number are given.
\end{Description}
\begin{Usage}
\begin{verbatim}
data(rotifer)
\end{verbatim}
\end{Usage}
\begin{Format}\relax
\describe{
\item[\code{density}] specific density of fluid

\item[\code{pm.y}] number falling out for
\emph{P. major}

\item[\code{pm.total}] total number of
\emph{P. major}

\item[\code{kc.y}] number falling out for
\emph{K. cochlearis}

\item[\code{kc.tot}] total number of
\emph{K. cochlearis}
}
\end{Format}
\begin{Source}\relax
D. Collett (1991)
\emph{Modelling Binary Data.}
Chapman \& Hall.
p.217
\end{Source}

