asis"><em>rounded outwards</em></span>. That is to say lower quantiles
            (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> th