Sulfate concentrations (mg/L). Nondetects reported as <1450
.
data(EPA.89b.sulfate.df)
A data frame with 24 observations on the following 3 variables.
Sulfate.orig
a character vector of original sulfate concentration (mg/L)
Sulfate
a numeric vector of sulfate concentations with <1450
coded as 1450
Censored
a logical vector indicating which observations are censored