<p>Once you have 300 reputation, you can create tags; so you're free to do so.  You simply edit an appropriate question and type the name you want for your new tag in the <strong>tags</strong> field (supposing there aren't 5 tags already--that's the limit).  If the tag doesn't end up on at least one more question within six months, it will be automatically deleted.  For more information, see <a href="https://stats.stackexchange.com/help/privileges/create-tags">here</a>.  </p>

<p>Regarding the merits of this proposal, I personally don't have strong opinions.  You've done the research, if there are recurring on-topic questions about this issue, then we should have a tag for them.  Here are a couple of suggestions I have about tag creation:  </p>

<ul>
<li>I think it would be better to have one tag than two.  </li>
<li>You can't have spaces between words, you have to put a dash "-".  </li>
<li>My guess is that 'tailed' is more common terminology than 'sided'.  </li>
<li>It's best for tags to have names that are as short as possible.  </li>
<li>If there are several names that might work almost as well, you could preempt them by asking the moderators to create them and make them synonyms of your new tag.  </li>
</ul>

<p>So a possible name might be: <code>[1-vs-2-tailed]</code>, but I'm sure someone else might be able to come up with a better name.  </p>
