<p>Two very popular tags are <a href="https://stats.stackexchange.com/questions/tagged/hypothesis-testing" class="post-tag" title="show questions tagged &#39;hypothesis-testing&#39;" rel="tag">hypothesis-testing</a> (3.4k questions) and <a href="https://stats.stackexchange.com/questions/tagged/statistical-significance" class="post-tag" title="show questions tagged &#39;statistical-significance&#39;" rel="tag">statistical-significance</a> (2.4k questions).</p>

<p>These two concepts are very much related, and whenever I happen to edit a question that has one of these tags I almost always feel that I should add another one too. Looking now at the top-voted questions in both tags, I don't see much of a difference in topics. However, I am not actively following any of these tags and so can easily miss some nuances. Hence my question:</p>

<ul>
<li><p>Should we maybe make them synonyms? If so, what is a better master tag?</p></li>
<li><p>Or should we maintain some difference  in usage between these tags? If so, what should this difference be? Can we hope to enforce this difference, given 6k existing questions?</p></li>
</ul>

<p>There is also a very related <a href="https://stats.stackexchange.com/questions/tagged/p-value" class="post-tag" title="show questions tagged &#39;p-value&#39;" rel="tag">p-value</a> tag (950 questions)<strike>, but I feel that it should stay separate. There are enough questions asking specifically about $p$-values, their meaning, and properties.</strike> <strong>Update following @gung's comment:</strong> Actually, [p-value] is used mostly interchangeably with the former two tags, so perhaps we should think of combining all three tags together.</p>
