ex2016: Bumpus Natural Selection Data

In Sleuth3: Data Sets from Ramsey and Schafer's "Statistical Sleuth (3rd Ed)"

Description

Hermon Bumpus analysed various characteristics of some house sparrows that were found on the ground after a severe winter storm in 1898. Some of the sparrows survived and some perished. This data set contains the survival status, age, the length from tip of beak to tip of tail (in mm), the alar extent (length from tip to tip of the extended wings, in mm), the weight in grams, the length of the head in mm, the length of the humerus (arm bone, in inches), the length of the femur (thigh bones, in inches), the length of the tibio–tarsus (leg bone, in inches), the breadth of the skull in inches and the length of the sternum in inches.

Usage

ex2016

Format

A data frame with 87 observations on the following 11 variables.

Status

Survival status, factor with levels "Perished" and "Survived"

AG

a numerical code corresponding to two categories of age, with 1 = "adult" and 2 = "juvenile"

TL

total length (in mm)

AE

alar extent (in mm)

WT

weight (in grams)

BH

length of beak and head (in mm)

HL

length of humerus (in inches)

FL

length of femur (in inches)

TT

length of tibio–tarsus (in inches)

SK

width of skull (in inches)

KL

length of keel of sternum (in inches)

Source

Ramsey, F.L. and Schafer, D.W. (2013). The Statistical Sleuth: A Course in Methods of Data Analysis (3rd ed), Cengage Learning.

See Also

ex0221

Examples

str(ex2016)

Example output

'data.frame':	87 obs. of  11 variables:
 $ Status: Factor w/ 2 levels "Perished","Survived": 2 2 2 2 2 2 2 2 2 2 ...
 $ AG    : int  1 1 1 1 1 1 1 1 1 1 ...
 $ TL    : int  154 160 155 154 156 161 157 159 158 158 ...
 $ AE    : int  241 252 243 245 247 253 251 247 247 252 ...
 $ WT    : num  24.5 26.9 26.9 24.3 24.1 26.5 24.6 24.2 23.6 26.2 ...
 $ BH    : num  31.2 30.8 30.6 31.7 31.5 31.8 31.1 31.4 29.8 32 ...
 $ HL    : num  0.69 0.74 0.73 0.74 0.71 0.78 0.74 0.73 0.7 0.75 ...
 $ FL    : num  0.67 0.71 0.7 0.69 0.71 0.74 0.74 0.72 0.67 0.74 ...
 $ TT    : num  1.02 1.18 1.15 1.15 1.13 1.14 1.15 1.13 1.08 1.15 ...
 $ SK    : num  0.59 0.6 0.6 0.58 0.57 0.61 0.61 0.61 0.6 0.61 ...
 $ KL    : num  0.83 0.84 0.85 0.84 0.82 0.89 0.86 0.79 0.82 0.86 ...

Sleuth3 documentation built on May 2, 2019, 6:41 a.m.