<p>It's tricky but doable.</p>

<p>Go to <a href="http://stats.stackexchange.com/tags">http://stats.stackexchange.com/tags</a> and type "arma". You will see the original <a href="https://stats.stackexchange.com/questions/tagged/arma" class="post-tag" title="show questions tagged &#39;arma&#39;" rel="tag">arma</a> tag with its own question count and excerpt (this is because it was never <em>merged</em> into <a href="https://stats.stackexchange.com/questions/tagged/arima" class="post-tag" title="show questions tagged &#39;arima&#39;" rel="tag">arima</a>). There is an "edit" link there too, leading to <a href="http://stats.stackexchange.com/edit-tag-wiki/830">http://stats.stackexchange.com/edit-tag-wiki/830</a> -- and this gets you where you want.</p>
