Relative liver weights

Description

Data from a toxicity trial with male Wistar rats: Relative liver weights in a negative control group and in 4 dose groups with an increasing dose of an active treatment. After treatment the relative liver weights of the rats were computed.

Usage

data(liver)

Format

A data frame with 38 observations on the following 2 variables.

dosage

A numeric vector indicating the dose/control group.

weight

A numeric vector containing the relative liver weights.

Details

The objective is to test if the active treatment influences the liver weight of the rats.

Source

Brunner, E., Munzel, U. (2002): Nichtparametrische Datenanalyse - Unverbundene Stichproben. Statistik und ihre Anwendungen, Springer-Verlag.

Examples

data(liver)
boxplot(weight~dosage,data=liver)

Results