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\name{bermuda.grass}
\alias{bermuda.grass}
\docType{data}
\title{Bermuda grass experiment data}
\description{
Yields of bermuda grass for a factorial design of nutrients
nitrogen,
phosphorus, and potassium.
}
\usage{
bermuda.grass
}
\format{
A data frame with 64 observations on the following 4 variables.
\describe{
\item{y}{yield of bermuda grass in tons per acre}
\item{Nit}{level of nitrogen}
\item{Phos}{level of phosphorus}
\item{Pot}{level of potassium}
}
}
\source{
McCullagh, P., and Nelder, J. (1989), Generalized Linear Models,
Chapman and Hall.
}
\keyword{datasets}
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