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digs
Permanent link - Posted 7 days ago (via junkcharts.typepad.com)
Kaiser Fung (Numbers Rule Your World, Principal Analytics Prep) finds some everyday examples of miscoded data, of which discovery eludes most data analysts....
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Permanent link - Posted 7 days ago (via flowingdata.com)
There are many mistakes you can make when you first get into visualization.…Tags: pitfalls...
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Permanent link - Posted 7 days ago (via flowingdata.com)
From xkcd, a blockbuster idea right here.…Tags: humor, xkcd...
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Permanent link - Posted 7 days ago (via flowingdata.com)
Levees are intended to prevent flooding in the areas they are built, but…Tags: flood, levees, physical, ProPublica, Reveal...
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Permanent link - Posted 7 days ago (via andrewgelman.com)
[Somewhat-relevant image] It seems that some people’s comments are getting trapped in the spam filter. Here’s how things go. The blog software triages the comments: 1. Most legitimate comments are automatically approved. You write the comment and it shows up right away. 2. Some comments are flagged as potentially spam. About half of these are […] The post Trapped in the spam fold...
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Permanent link - Posted 7 days ago (via andrewgelman.com)
A reader who wishes to remain anonymous writes: I would be curious to hear your thoughts on is motivated reasoning among open science advocates. In particular, I’ve noticed that papers arguing for open practices have seriously bad/nonexistent causal identification strategies. Examples: Kidwell et al. 2017, Badges to Acknowledge Open Practices: A Simple, Low-Cost, Effective Method […] T...
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Permanent link - Posted 7 days ago (via rjlipton.wordpress.com)
A few twists on Turing’s proof of undecidability of predicate calculus By permission of Rich Longmore, artist, blog source Alan Turing presaged Stephen Cook’s proof of -completeness of Turing reduced the halting problem for his machines to the decision problem of the first-order predicate calculus, thus showing (alongside Alonzo Church) that the latter is undecidable. […]...
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digs
Permanent link - Posted 7 days ago (via andrewgelman.com)
Dean Eckles pointed me to this recent report by Andrew Mercer, Arnold Lau, and Courtney Kennedy of the Pew Research Center, titled, “For Weighting Online Opt-In Samples, What Matters Most? The right variables make a big difference for accuracy. Complex statistical methods, not so much.” I like most of what they write, but I think […] The post “The most important aspect of a...
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Permanent link - Posted 9 days ago (via mathlesstraveled.com)
After several long tangents writing about orthogons and the chromatic number of the plane, I’m finally getting back to writing about primality testing. All along in this series, my ultimate goal has been to present some general primality testing algorithms … Continue reading →...
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Permanent link - Posted 9 days ago (via feedproxy.google.com)
A common question is why e (2.71828...) is so special. Why not 2, 3.7 or some other number as the base of growth? First off, e was discovered, not chosen. Think of the speed of light, c. It wasn't decided to be 299,792,458 m/s -- we did measurements and realized that under ideal, universal conditions […]...
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