cOption</tt></li>
 <li>The major statistics options are (see <a
  href="http://root.cern.ch/root/htmldoc/TEfficiency.html#stat">class
  documentation</a> for a full description and examples):
  <ul>
    <li>Clopper_pearson (default) using the function
    <tt>TEfficiency::ClopperPearson(n, k, cl)</tt>
    </li>

    <li>Bayesian methods using the function
    <tt>TEfficiency::Bayesian(n, k, cl, alpha, beta)</tt>.
    In this case the alpha and beta parameters of the
  beta prior distribution for the efficie