darwin                 package:boot                 R Documentation

Darwin's Plant Height Differences

Description:

     The 'darwin' data frame has 15 rows and 1 columns.

     Charles Darwin conducted an experiment to examine the superiority
     of cross-fertilized plants over self-fertilized plants.  15 pairs
     of plants were used. Each pair consisted of one cross-fertilized
     plant and one self-fertilized plant which germinated at the same
     time and grew in the same pot. The plants were measured at a fixed
     time after planting and the difference in heights between the
     cross- and self-fertilized plants are recorded in eighths of an
     inch.

Usage:

     darwin

Format:

     This data frame contains the following column:


     'y' The difference in heights for the pairs of plants (in units of
          0.125 inches).

Source:

     The data were obtained from

     Fisher, R.A. (1935) _Design of Experiments_. Oliver and Boyd.

References:

     Darwin, C. (1876)  _The Effects of Cross- and Self-fertilisation
     in the Vegetable Kingdom_.  John Murray.

     Davison, A.C. and Hinkley, D.V. (1997)  _Bootstrap Methods and
     Their Application_. Cambridge University Press.

