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Permanent link - Posted 9 days ago (via andrewgelman.com)
Kyle Meyer writes: Last August you wrote about [1] a PNAS paper that looked at “jet lag” and a bunch of metrics across twenty MLB seasons. I’ve played around with incorporating their measure of jet lag into a model of run differentials [2], working from your posts about estimating team abilities in soccer [3-5]. I […] The post How jet lag impairs major league statistical pe...
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Permanent link - Posted 9 days ago (via andrewgelman.com)
Lizzie Wolkovich writes: I just got asked to comment on this article [“Genotypic variability enhances the reproducibility of an ecological study,” by Alexandru Milcu et al. ]—I have yet to have time to fully sort out their stats but the first thing that hit me about it was they seem to be suggesting a way […] The post Don’t define reproducibility based on p-values app...
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Permanent link - Posted 10 days ago (via blog.computationalcomplexity.org)
(An exposition of Nash-Williams's proof of  the Kruskal Tree Theorem is here) Andrew Vazsonyi (the mathematician, see here, not the folklorist, see here for that folklorist's wife) conjectured that the set of trees, under the minor ordering, is a well quasi order. I do not know when he made the conjecture, but he was born in 1916 and the conjecture was solved in 1960, so y...
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Permanent link - Posted 11 days ago (via yetanothermathblog.com)
Nobel prize winner John Nash struggled with mental illness for most of his life. His struggles were described Sylvia Nasar’s well-known biography, A Beautiful Mind, as well as a film of the same name starring Russell Crowe. Now, John Nash is practically a household name, honored for his contributions to the mathematics of game theory and […]...
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Permanent link - Posted 11 days ago (via andrewgelman.com)
Someone writes: I’ve been a follower of your blog and your continual coverage of “cargo cult science”. Since this type of science tends to be more influential and common than the (idealized) non-“cargo cult” stuff, I’ve been trying to find ways of reassuring myself that this type of science isn’t a bad thing (because if […] The post A possible defens...
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Permanent link - Posted 11 days ago (via andrewgelman.com)
A students wrote in one of his homework assignments: Sidenote: I know some people say you’re not supposed to use loops in R, but I’ve never been totally sure why this is (a speed thing?). My first computer language was Java, so my inclination is to think in loops before using some of the other […] The post Learn by experimenting! appeared first on Statistical Modeling, Causal Inference, ...
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Permanent link - Posted 12 days ago (via flowingdata.com)
Show connections in the circular layout for a more compact presentation.Tags: R...
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Permanent link - Posted 12 days ago (via andrewgelman.com)
Yesterday we discussed a sad but all-too-familiar story of a little research project that got published and hyped beyond recognition. The published paper was called, “The more you play, the more aggressive you become: A long-term experimental study of cumulative violent video game effects on hostile expectations and aggressive behavior,” but actually that title was […] The post T...
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Permanent link - Posted 13 days ago (via flowingdata.com)
This is a fun drawing experiment in R by Antonio Sánchez Chinchón. A…Tags: R, traveling salesman...
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Permanent link - Posted 13 days ago (via mathlesstraveled.com)
We’re nearing the end of this little diversion on orthogons. We now know that orthogons are in 1-1 correspondence with orthobraces, and we can efficiently generate orthobraces. The only thing left is to find a way to turn orthobraces into … Continue reading →...
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