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| genotype   | R Documentation   |
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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 to rear.

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Growth of the Rat.* Unpublished Ph.D. thesis, University of California.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.
