trout {GLMsData}

The effect of potassium cyanate on trout eggs

Description

The survival of trout eggs exposed to potassium cyanate

Usage

data(trout)

Format

A data frame with 48 observations on the following 4 variables.

Conc

the concentration of potassium cyanate in mg/litre; a numeric variable

When

when the toxicant is applied; a factor with levels Now or Later (after the eggs have water-hardened)

Number

the number of eggs used; a numeric variable

Dead

the number of eggs dead; a numeric variable

Details

The data show the number of trout eggs that are dead at Day 19 after exposure to potassium cyanate (kscn). Half the eggs in each vial were first allowed to water-harden before the toxicant was applied; the other were exposed immediately.

Source

R. J. O'Hara Hines and E. M. Carter (1993) Improved added variable and partial residual plots for detection of influential observations in generalized linear models. Applied Statistics, 42(1), 3–20.

D. J. Hand, F. Daly, A. D. Lunn, K. J. McConway, and E. Ostrowski (1994) A Handbook of Small Data Sets, London: Chapman and Hall. Dataset 418.

Examples

data(trout)
summary(trout)