<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><title>R: Foster Feeding Experiment</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link rel="stylesheet" type="text/css" href="R.css">
</head><body>

<table width="100%" summary="page for foster"><tr><td>foster</td><td align="right">R Documentation</td></tr></table>

<h2> Foster Feeding Experiment </h2>

<h3>Description</h3>


<p>The data are from a foster feeding experiment
with rat mothers and litters of four different genotypes.
The measurement is the litter weight after
a trial feeding period.
</p>


<h3>Usage</h3>

<pre>data("foster")</pre>


<h3>Format</h3>


<p>A data frame with 61 observations on the following 3 variables.
</p>

<dl>
<dt><code>litgen</code></dt><dd><p>genotype of the litter, a factor with levels 
<code>A</code>, <code>B</code>, <code>I</code>, and <code>J</code>.</p>
</dd>
<dt><code>motgen</code></dt><dd><p>genotype of the mother, a factor with levels 
<code>A</code>, <code>B</code>, <code>I</code>, and <code>J</code>.</p>
</dd>
<dt><code>weight</code></dt><dd><p>the weight of the litter after a feeding period.</p>
</dd>
</dl>



<h3>Details</h3>


<p>Here the interest lies in uncovering the effect of genotype of mother and litter on 
litter weight.
</p>


<h3>Source</h3>


<p>D. J. Hand, F. Daly, A. D. Lunn, K. J. McConway and E. Ostrowski (1994).
<EM>A Handbook of Small Datasets</EM>, Chapman and Hall/CRC, London.
</p>


<h3>Examples</h3>

<pre>

  data("foster", package = "HSAUR")
  plot.design(foster)

</pre>


</body></html>
