<blockquote>
  <p>we only need the tags [imputation] and [multiple-imputation]. To me, [data-imputation] appears to be somewhat redundant</p>
</blockquote>

<p>As I've already written in the comments above, <a href="https://stats.stackexchange.com/questions/tagged/imputation" class="post-tag" title="show questions tagged &#39;imputation&#39;" rel="tag">imputation</a> is since 2013 a synonym of <a href="https://stats.stackexchange.com/questions/tagged/data-imputation" class="post-tag" title="show questions tagged &#39;data-imputation&#39;" rel="tag">data-imputation</a>. However, it is a <em>non-merged</em> synonym, and that's why 4 questions that were originally taged with [imputation] still remain to be tagged with this (obsolete) tag. This can clearly be confusing, as demonstrated by your question. That's why I suggest to merge all our non-merged tag synonyms: <a href="https://stats.meta.stackexchange.com/questions/2790">Should all our non-merged tag synonyms be merged (or removed)?</a></p>

<p>I am posting this answer in order to draw attention to this merging issue.</p>
