bears

Description

Body measurements for 143 wild bears.

Format

A data frame with 143 observations on the following 12 variables.

• ID. Indentification number

• Age. Bear's age, in months. Note, wild bears are always born in January, so an expert can estimate the bear's age without directly asking it how old it is.

• Month. Month when the measurement was made. 1 = Jan., 12 = Dec. Since bears hibernate in the winter, their body shape probably depends on the season.

• Sex. 1 = male 2 = female

• Head.L. Length of the head, in inches

• Head.W. Width of the head, in inches

• Neck.G. Girth (distance around) the neck, in inches

• Length. Body length, in inches

• Chest.G. Girth (distance around) the chest, in inches

• Weight. Weight of the bear, in pounds

• Obs.No. Observation number for this bear. For example, the bear with ID = 41 (Bertha) was measured on four occasions, in the months coded 7, 8, 11, and 5. The value of Obs.No goes from 1 to 4 for these observations.

• Name. The names of the bears given to them by the researchers

Details

Wild bears were anesthetized, and their bodies were measured and weighed. One goal of the study was to make a table (or perhaps a set of tables) for hunters, so they could estimate the weight of a bear based on other measurements. This would be used because in the forest it is easier to measure the length of a bear, for example, than it is to weigh it.

Source

This data is in the example data set Bears.MTW distributed with Minitab

References

This data set was supplied by Gary Alt. Entertaining references are in Reader's Digest April, 1979, and Sports Afield September, 1981.

Examples

data(bears)
boxplot(Weight~Sex, data = bears)

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(Bolstad)

Attaching package: 'Bolstad'

The following objects are masked from 'package:stats':

    IQR, sd, var

> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/Bolstad/bears.Rd_%03d_medium.png", width=480, height=480)
> ### Name: bears
> ### Title: bears
> ### Aliases: bears
> ### Keywords: datasets
> 
> ### ** Examples
> 
> 
> data(bears)
> boxplot(Weight~Sex, data = bears)
> 
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>