# Brain: Brain weight versus body weight of 28 animals In BSDA: Basic Statistics and Data Analysis

 Brain R Documentation

## Brain weight versus body weight of 28 animals

### Description

Data for Exercises 2.15, 2.44, 2.58 and Examples 2.3 and 2.20

### Usage

``````Brain
``````

### Format

A data frame/tibble with 28 observations on three variables

species

a factor with levels ```African elephant```, `Asian Elephant`, `Brachiosaurus`, `Cat`, `Chimpanzee`, `Cow`, `Diplodocus`, `Donkey`, `Giraffe`, `Goat`, `Gorilla`, `Gray wolf`, `Guinea Pig`, `Hamster`, `Horse`, `Human`, `Jaguar`, `Kangaroo`, `Mole`, `Mouse`, `Mt Beaver`, `Pig`, `Potar monkey`, `Rabbit`, `Rat`, `Rhesus monkey`, `Sheep`, and `Triceratops`

bodyweight

body weight (in kg)

brainweight

brain weight (in g)

### Source

P. Rousseeuw and A. Leroy, Robust Regression and Outlier Detection (New York: Wiley, 1987).

### References

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

### Examples

``````
plot(log(brainweight) ~ log(bodyweight), data = Brain,
pch = 19, col = "blue", main = "Example 2.3")
mod <- lm(log(brainweight) ~ log(bodyweight), data = Brain)
abline(mod, lty = "dashed", col = "blue")

``````

BSDA documentation built on Sept. 19, 2023, 1:08 a.m.