ternal-link">mean</a></span><span class="op">(</span><span class="va">mri</span><span class="op">$</span><span class="va">weight</span><span class="op">)</span>, <span class="fu"><a href="https://rdrr.io/r/stats/sd.html" class="external-link">sd</a></span><span class="op">(</span><span class="va">mri</span><span class="op">$</span><span class="va">weight</span><span class="op">)</span>, null.hypoth <span class="op">=</span> <span class="fl">155</span><span class="op">)</span></span></code></pre></div>
<pre>