<span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="mean.html" title="Class template mean">mean</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  <span class="identifier">std</span><span class="special">::</span><span