<p>There is a tag <a href="https://stats.stackexchange.com/questions/tagged/type-i-errors" class="post-tag" title="show questions tagged &#39;type-i-errors&#39;" rel="tag">type-i-errors</a> which covers Type 1 and Type 2 errors; that is very clear from the excerpt and the Wiki. There is also a tag <a href="https://stats.stackexchange.com/questions/tagged/type-ii-errors" class="post-tag" title="show questions tagged &#39;type-ii-errors&#39;" rel="tag">type-ii-errors</a> which seems to deal with Type 2 error specifically (has no Wiki, just an excerpt). I think it is redundant. </p>

<ul>
<li>First, Type 2 errors are already covered by <a href="https://stats.stackexchange.com/questions/tagged/type-i-errors" class="post-tag" title="show questions tagged &#39;type-i-errors&#39;" rel="tag">type-i-errors</a>.</li>
<li>Second, if we wanted separate tags for separate types, than we should use <a href="https://stats.stackexchange.com/questions/tagged/type-i-error" class="post-tag" title="show questions tagged &#39;type-i-error&#39;" rel="tag">type-i-error</a> and <a href="https://stats.stackexchange.com/questions/tagged/type-ii-error" class="post-tag" title="show questions tagged &#39;type-ii-error&#39;" rel="tag">type-ii-error</a> (singular) or probably <a href="https://stats.stackexchange.com/questions/tagged/type-1-error" class="post-tag" title="show questions tagged &#39;type-1-error&#39;" rel="tag">type-1-error</a> and <a href="https://stats.stackexchange.com/questions/tagged/type-2-error" class="post-tag" title="show questions tagged &#39;type-2-error&#39;" rel="tag">type-2-error</a> (singular and with Arabic numerals). </li>
</ul>

<p>So shall we get rid of the <a href="https://stats.stackexchange.com/questions/tagged/type-ii-errors" class="post-tag" title="show questions tagged &#39;type-ii-errors&#39;" rel="tag">type-ii-errors</a> tag?</p>
