<p>Are there any ideas / proposed explanations about why CV stands out regarding the percentage of questions that have <strong>zero</strong> answers? (I have excluded questions that have answers, but none of them are upvoted/accepted).</p>

<p>\begin{array}{| r | r | r |}
  \hline                       
  \rm June\; 22, 2014 &amp; \rm Total\ Qs &amp; \text{Qs with no As} &amp; \text{%}\\ 
  \hline                       
\rm Physics &amp; 35,372 &amp; 4,331 &amp; 12.2 \\
\rm Cross \;Validated &amp; 38,582 &amp; 11,468 &amp; \mathbf {29.7} \\
\rm Math \; Overflow &amp; 51,364 &amp; 9,859 &amp; 19.2 \\
\rm Math.SE &amp; 296,538 &amp; 39,727 &amp; 13.4 \\
\rm Stack \;Overflow &amp; 7,509,663 &amp; 801,136 &amp; 10.7 \\
  \hline  
\end{array}</p>

<p>For the comparison, I purposefully chose other SE sites which deal in fields that require a mathematical background.</p>

<p>I have the feeling this large difference cannot be solely attributed to the fact that sometimes questions are answered through comments (that in any case needs to be combined with the additional argument that on CV, we tend to do that more than on the other sites).</p>

<p><strong>ADDENDUM</strong><br>
CV-meta link
14 months back... <a href="https://stats.meta.stackexchange.com/questions/1538/why-is-our-answer-rate-so-low?rq=1">Why is our answer rate so low?</a></p>
