ducks                  package:boot                  R Documentation

Behavioral and Plumage Characteristics of Hybrid Ducks

Description:

     The 'ducks' data frame has 11 rows and 2 columns.

     Each row of the data frame represents a male duck who is a second
     generation cross of mallard and pintail ducks.  For 11 such ducks
     a behavioural and plumage index were calculated.  These were
     measured on scales devised for this experiment which was to
     examine whether there was any link between which species the ducks
     resembled physically and which they resembled in behaviour.  The
     scale for the physical appearance ranged from 0 (identical in
     appearance to a mallard) to 20 (identical to a pintail).  The
     behavioural traits of the ducks were on a scale from 0 to 15 with
     lower numbers indicating closer to mallard-like in behaviour.

Usage:

     data(ducks)

Format:

     This data frame contains the following columns:

     'plumage' The index of physical appearance based on the plumage of
          individual ducks.

     'behaviour' The index of behavioural characteristics of the ducks.

Source:

     The data were obtained from

     Larsen, R.J. and Marx, M.L. (1986)  _An Introduction to
     Mathematical Statistics and its Applications_  (Second Edition).
     Prentice-Hall.

References:

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

     Sharpe, R.S., and Johnsgard, P.A. (1966) Inheritance of behavioral
     characters in F2 mallard  x  pintail (_Anas Platyrhynchos L.  x 
     Anas Acuta L._)  hybrids. _Behaviour_, *27*, 259-272.

