<p>Mostly predictive statistics (aka machine learning).</p>

<p>Download the app:</p>

<ul>
<li><a href="https://itunes.apple.com/us/app/stack-exchange/id871299723" rel="nofollow noreferrer">https://itunes.apple.com/us/app/stack-exchange/id871299723</a></li>
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<p>With regard to the fine art of asking a question, please keep in mind:</p>

<ul>
<li><strong><a href="https://en.wikipedia.org/wiki/KISS_principle" rel="nofollow noreferrer">KISS</a> = <a href="https://en.wikipedia.org/wiki/BLUF_(communication)" rel="nofollow noreferrer">BLUF</a> + <a href="https://en.wikipedia.org/wiki/TL;DR" rel="nofollow noreferrer">TLDR</a>.™</strong></li>
<li>Take the tour: <a href="https://stats.stackexchange.com/tour">https://stats.stackexchange.com/tour</a></li>
<li>Read: <a href="https://stats.stackexchange.com/help/how-to-ask">https://stats.stackexchange.com/help/how-to-ask</a></li>
<li>Read: <a href="https://meta.stackoverflow.com/editing-help">https://meta.stackoverflow.com/editing-help</a></li>
<li>Read: <a href="https://math.meta.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference">https://math.meta.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference</a></li>
</ul>

Jim