ex0918: Speed of Evolution

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

Description

Researchers studied the development of a fly (Drosophila subobscura) that had been accidentally introduced from the Old World into North America around 1980.

Usage

ex0918

Format

A data frame with 21 observations on the following 8 variables.

Continent

a factor with levels "NA" and "EU"

Latitude

latitude (degrees)

Females

average wing size (10^3 x log mm) of female flies on log scale

SE_Females

standard error of wing size (10^3 x log mm) of female flies on log scale

Males

average wing size (10^3 x log mm) of male flies on log scale

SE_Males

standard error of wing size (10^3 x log mm) of male flies on log scale

Ratio

average basal length to wing size ratios of female flies

SE_Ratio

standard error of average basal length to wing size ratio of female flies

Source

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

References

Huey, R.B., Gilchrist, G.W., Carlson, M.L., Berrigan, D. and Serra, L. (2000). Rapid Evolution of a Geographic Cline in Size in an Introduced Fly, Science 287(5451): 308–309.

Examples

str(ex0918)

Example output

'data.frame':	21 obs. of  8 variables:
 $ Continent : Factor w/ 2 levels "EU","NA": 2 2 2 2 2 2 2 2 2 2 ...
 $ Latitude  : num  35.5 37 38.6 40.7 40.9 42.4 45 46.8 48.8 49.8 ...
 $ Females   : int  901 896 906 907 898 893 913 915 927 924 ...
 $ SE_Females: num  2.5 3.5 3 3.5 3.6 3.4 4.3 3.8 2 4.5 ...
 $ Males     : int  797 806 812 807 818 809 810 819 800 823 ...
 $ SE_Males  : num  3.8 3 3.2 3.2 2.7 3.3 4.3 3.3 4.9 2.2 ...
 $ Ratio     : num  0.831 0.834 0.836 0.833 0.83 0.828 0.834 0.825 0.832 0.824 ...
 $ SE_Ratio  : num  0.01 0.014 0.012 0.013 0.012 0.015 0.024 0.014 0.009 0.011 ...

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