Brain Size and Litter Size

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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

1

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. (2013). The Statistical Sleuth: A Course in Methods of Data Analysis (3rd ed), Cengage Learning.

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

1

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