genotype                package:MASS                R Documentation

Rat Genotype Data

Description:

     Data from a foster feeding experiment with rat mothers and litters
     of four different genotypes: 'A', 'B', 'I' and 'J'.  Rice litters
     were separated from their natural mothers at birth and given to
     foster mothers to rear.

Usage:

     data(genotype)

Format:

     The data frame has the following components:

     'Litter' The genotype of the litter

     'Mother' The genotype of the foster mother

     'Wt' Litter average weight gain of the litter, in grams at age 28
          days. (The source states that the within-litter variability
          is negligible.)

Source:

     Scheffe, H. (1959) _The Analysis of Variance_ Wiley p. 140.

     Bailey, D. W. (1953) _The Inheritance of Maternal Influences on
     the Growth of the Rat._ Unpublished Ph.D. thesis, University of
     California. Table B of the Appendix.

References:

     Venables, W. N. and Ripley, B. D. (1999) _Modern Applied
     Statistics with S-PLUS._ Third Edition. Springer.

