antiles (where the probability is less than 0.5)
          are rounded downward, and upper quantiles (where the probability is greater
          than 0.5) are rounded upwards. This behaviour ensures that if an X% quantile
          is requested, then <span class="emphasis"><em>at least</em></span> the requested coverage
          will be present in the central region, and <span class="emphasis"><em>no more than</em></span>
          the requested coverage will be present in the tails.
        </p>
<p>
     