Caltech Researchers Find Evidence of a Planet Beyond Pluto
> Batygin and Brown inferred its presence from the peculiar clustering of six previously known objects that orbit beyond Neptune.<p>This raised a big red flag in my mind. This must produce a literally astronomical multiple comparisons problem. Yes they reported sigma = 3.8, but if they didn't do their multiple comparisons correction right (which I am in no position to determine), they're basically reading tea leaves.<p>If you're not familiar with multiple comparisons, it's kind of like [this](<a href="https://www.goodreads.com/quotes/649893-you-know-the-most-amazing-thing-happened-to-me-tonight" rel="nofollow">https://www.goodreads.com/quotes/649893-you-know-the-most-am...</a>) or [this](<a href="https://xkcd.com/882/" rel="nofollow">https://xkcd.com/882/</a>). If you look at enough extra-neptunian bodies, some of them are going to be in an odd looking cluster.