a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/mean.html" class="external-link">mean</a></span><span class="op">(</span><span class="va">mu</span><span class="op">)</span>, <span class="op">-</span><span class="fu"><a href="https://rdrr.io/r/base/diff.html" class="external-link">diff</a></span><span class="op">(</span><span class="va">mu</span><span class="op">)</span> <span class="op">/</span> <span class="fl">2</span>, <span class="fu"><a href="https://rdrr.io/r/base/me