<p>I think this question <em>is</em> <a href="https://stats.stackexchange.com/questions/tagged/self-study" class="post-tag" title="show questions tagged &#39;self-study&#39;" rel="tag">self-study</a>, or at any rate the OP can benefit from its being treated as such; &amp; it's preferable that this back-&amp;-forth is clearly visible to anyone else reading it. <strike>The comments can always be tidied up into an answer when you're done&mdash;perhaps picking &amp; choosing which parts of the discovery process may be of most general interest.</strike> It'll help deter people from rushing in with a full answer, &amp; later on provide an good example of how to treat questions like this.</p>
