case0902: Why Do Some Mammals Have Large Brains for Their Size?

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

Description

The data are the average values of brain weight, body weight, gestation lengths (length of pregnancy) and litter size for 96 species of mammals.

Usage

case0902

Format

A data frame with 96 observations on the following 5 variables.

Species

species

Brain

average brain weight (in grams)

Body

average body weight (in kilograms)

Gestation

gestation period (in days)

Litter

average litter size

Source

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

See Also

case0902

Examples

str(case0902)
pairs(log(Brain)~log(Body)+log(Litter)+Gestation, case0902)

Example output

'data.frame':	96 obs. of  5 variables:
 $ Species  : chr  "Quokka" "Hedgehog" "Tree shrew" "Elephant shrew I" ...
 $ Brain    : num  17.5 3.5 3.15 1.14 1.37 22 12.8 9.9 54 73 ...
 $ Body     : num  3.5 0.93 0.15 0.049 0.064 2.1 1.2 0.7 7.7 3.7 ...
 $ Gestation: num  26 34 46 51 46 135 90 135 139 180 ...
 $ Litter   : num  1 4.6 3 1.5 1.5 1 1.2 1 1 1 ...

Sleuth2 documentation built on May 2, 2019, 7:01 a.m.