poison {isdals}

Effects of insecticides on mortality

Description

The data concerns three insecticides (rotenone, deguelin, and a mixture of those). A total of 818 insects were exposed to different doses of one of the three insecticides. After exposure, it was recorded if the insect died or not.

Usage

data(poison)

Format

A data frame with 818 observations on the following 3 variables.

status

status of insect: dead=1, alive=0 (numeric vector)

poison

type of insecticide. A factor with levels D (deguelin) M (mixture)) R (rotenone)

logdose

natural logarithm of dose of insecticide

Source

D.J. Finney (1952). Probit analysis. Cambridge University Press, England.

Examples

data(poison)