openintro (version 1.3)

mammals: Sleep in Mammals

Description

This data set includes data for 39 species of mammals distributed over 13 orders. The data were used for analyzing the relationship between constitutional and ecological factors and sleeping in mammals. Two qualitatively different sleep variables (dreaming and non dreaming) were recorded. Constitutional variables such as life span, body weight, brain weight and gestation time were evaluated. Ecological variables such as severity of predation, safety of sleeping place and overall danger were inferred from field observations in the literature.

Usage

data(mammals)

source

http://www.statsci.org/data/general/sleep.txt

References

T. Allison and D. Cicchetti, "Sleep in mammals: ecological and constitutional correlates," Arch. Hydrobiol, vol. 75, p. 442, 1975.

Examples

data(mammals)
lmPlot(log(mammals$BodyWt), log(mammals$BrainWt))