case0201: Bumpus's Data on Natural Selection (Humerus)
Description
As evidence in support of natural selection, Bumpus presented
measurements on house sparrows brought to the Anatomical Laboratory of
Brown University after an uncommonly severe winter storm. Some of
these birds had survived and some had perished. Bumpus asked whether
those that perished did so because they lacked physical
characteristics enabling them to withstand the intensity of that
particular instance of selective elimination. The data are on the
humerus (arm bone) lengths for the 24 adult male sparrows that perished and
for the 35 adult males that survived.
Usage
case0201
Arguments
Format
A data frame with 59 observations on the following 2 variables.
Humerus
Humerus length of adult male sparrows (in inches)
Status
factor variable indicating whether the sparrow
perished or survived in a winter storm