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<html><head><title>R: Co-operative Trial in Analytical Chemistry</title>
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<table width="100%" summary="page for coop {MASS}"><tr><td>coop {MASS}</td><td align="right">R Documentation</td></tr></table>
<h2>Co-operative Trial in Analytical Chemistry</h2>
<h3>Description</h3>
<p>
Seven specimens were sent to 6 laboratories in 3 separate batches and
each analysed for Analyte. Each analysis was duplicated.
</p>
<h3>Usage</h3>
<pre>
coop
</pre>
<h3>Format</h3>
<p>
This data frame contains the following columns:
<dl>
<dt><code>Lab</code></dt><dd>Laboratory, <code>L1</code>, <code>L2</code>, ..., <code>L6</code>.
</dd>
<dt><code>Spc</code></dt><dd>Specimen, <code>S1</code>, <code>S2</code>, ..., <code>S7</code>.
</dd>
<dt><code>Bat</code></dt><dd>Batch, <code>B1</code>, <code>B2</code>, <code>B3</code> (nested within <code>Spc/Lab</code>),
</dd>
<dt><code>Conc</code></dt><dd>Concentration of Analyte in g/kg.
</dd></dl>
<h3>Source</h3>
<p>
Analytical Methods Committee (1987)
Recommendations for the conduct and
interpretation of co-operative trials,
<EM>The Analyst</EM>
<B>112</B>, 679–686.
</p>
<h3>References</h3>
<p>
Venables, W. N. and Ripley, B. D. (2002)
<EM>Modern Applied Statistics with S.</EM> Fourth edition. Springer.
</p>
<h3>See Also</h3>
<p>
<code><a href="chem.html">chem</a></code>, <code><a href="abbey.html">abbey</a></code>.
</p>
<hr><div align="center">[Package <em>MASS</em> version 7.2-44 <a href="00Index.html">Index]</a></div>
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