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

<h2>
Failures of Air-conditioning Equipment
</h2>

<h3>Description</h3>


<p>Proschan (1963) reported on the times between failures of the air-conditioning
equipment in 10 Boeing 720 aircraft. The <code>aircondit</code> data frame contains 
the intervals for the ninth aircraft while <code>aircondit7</code> contains those for the
seventh aircraft. 
</p>
<p>Both data frames have just one column.  Note that the data have been sorted 
into increasing order.
</p>


<h3>Usage</h3>

<pre>
aircondit
</pre>


<h3>Format</h3>


<p>The data frames contain the following column:
</p>

<dl>
<dt><code>hours</code></dt><dd>
<p>The time interval in hours between successive failures of the air-conditioning
equipment
</p>
</dd></dl>


<h3>Source</h3>


<p>The data were taken from
</p>
<p>Cox, D.R. and Snell, E.J. (1981) 
<EM>Applied Statistics: Principles and Examples</EM>. Chapman and Hall.
</p>


<h3>References</h3>


<p>Davison, A.C. and Hinkley, D.V. (1997) 
<EM>Bootstrap Methods and Their Application</EM>. Cambridge University Press.
</p>
<p>Proschan, F. (1963) Theoretical explanation of observed decreasing failure 
rate. <EM>Technometrics</EM>, <B>5</B>, 375-383.
</p>


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