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'. Rat litters
     were separated from their natural mothers at birth and given to
     foster mothers torear.

Usage:

     genotype

Format:

     The data frame has the following components:

     'Litter' genotype of the litter.

     'Mother' 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     the Growth of the Rat._ Unpublished Ph.D. thesis, University of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.

