data.loggamma: Brain Weights

Description Usage Format Details Source Examples

Description

This data concerns mean weights of the brains and bodies of 62 species of mammals. The first column contains values of species (Species), the second column is brain weight in grams (Brain), and the third column is body weight in kilograms (Body).

Usage

1

Format

A data frame with 62 observations on the following 3 variables.

Species

a string vector for species names

Brain

a numeric vector

Body

a numeric vector

Details

The goal is to investigate the linear relationship between the natural logarithm of brain weight and that of body weight, assuming that brain weights are observations from gamma distributions and their means depend on logarithms of body weights.

Source

Skovgaard, L. T. (2009). Confidence Intervals in Generalized Regression Models. Boca Raton, FL : CRC Press.

Examples

1
2
data(data.loggamma)
## maybe str(data.loggamma) ; plot(data.loggamma) ...

ppham27/setsim documentation built on May 24, 2017, 11:17 a.m.