LikelihoodTestStat</tt>Returns the log of profile
likelihood ratio.  Generally a powerful test statistic. </li>
<li><tt>NumEventsTestStat</tt>Returns the number of events in the
dataset.  Useful for number counting experiments.</li>
<li><tt>DebuggingTestStat</tt> Simply returns a uniform random number
between 0,1.  Useful for debugging.</li>
</ul>

<h4>SamplingDistribution and the TestStatSampler interface and
implementations</h4>
<p>We introduced a ``result'' or data model class called
<tt>SamplingDist