ex0333: Brain Size and Litter Size

In Sleuth2: Data Sets from Ramsey and Schafer's "Statistical Sleuth (2nd Ed)"

Brain Size and Litter Size

Description

Relative brain weights for 51 species of mammal whose average litter size is less than 2 and for 45 species of mammal whose average litter size is greater than or equal to 2.

Usage

ex0333

Format

A data frame with 96 observations on the following 2 variables.

Brainsize

relative brain sizes (1000 * Brain weight/Body weight) for 96 species of mammals

Littersize

factor variable with levels "Small" and "Large"

Source

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.

References

Sacher, G.A. and Staffeldt, E.F. (1974). Relation of Gestation Time to Brain Weight for Placental Mammals: Implications for the Theory of Vertebrate Growth, American Naturalist 108: 593–613.

See Also

case0902

Examples

str(ex0333)

Sleuth2 documentation built on May 29, 2024, 7:37 a.m.