## On the Pattern of Primes

July 23, 2012
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Jason Davies created this lovely interactive method for visualizing prime numbers, Prime Number Patterns [jasondavies.com]. As a companion to El patrón de los números primos by Omar E. Pol, the piece very elegantly allows you to explore ...

## Estimating required hospital bed capacity

July 23, 2012
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Estimating required hospital bed capacity requires a thorough analysis. There are a lot of ways of approaching a capacity requirement problem, but I think we can agree that a simple spreadsheet analysis just won't cut it. The approach described in this post makes use of discrete-event simulation and, just to  Read more »The post Estimating required hospital bed capacity appeared first on FishyOperations.

## 【Bio-Glossary】Hardy-Weinberg equilibrium

July 23, 2012
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$【Bio-Glossary】Hardy-Weinberg equilibrium$

The Hardy-Weinberg equilibrium is a principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors. When mating is random in a large population with no disruptive circumstances, the law predicts that both genotype and allele frequencies will remain constant because they [...]

## Special effects

July 23, 2012
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I just saw L’Age de Glace 4 and boy are my eyes tired. I’m just glad it wasn’t in 3-D or I probably would’ve thrown up. The special effects were amazing, way beyond George of the Jungle and that ilk. Which was good, as I could only understand about 10% of the dialogue. I’d heard [...]

## Clark Glymour: The Theory of Search Is the Economics of Discovery (part 2)

July 23, 2012
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“Some Thoughts Prompted by David Hendry’s Essay *,  (RMM) Special Topic: Statistical Science and Philosophy of Science,” by  Professor Clark Glymour Part 2 (of 2) (Please begin with part 1) The first thing one wants to know about a search method is what it is searching for, what would count as getting it right. One [...]

## Facebook’s Real Big Data Problem

July 23, 2012
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Facebook’s first quarterly earnings report as a public company is coming out this Thursday and everyone’s wondering what will be in it. One question is whether advertisers are going to Facebook over other sites like Google. “Advertisers ...

## Modeling Trick: Impact Coding of Categorical Variables with Many Levels

July 23, 2012
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One of the shortcomings of regression (both linear and logistic) is that it doesn’t handle categorical variables with a very large number of possible values (for example, postal codes). You can get around this, of course, by going to another modeling technique, such as Naive Bayes; however, you lose some of the advantages of regression [...] Related posts: Modeling Trick: Masked Variables A bit more on impact coding Modeling Trick:…

## Medalball: Moneyball for the olympics

July 23, 2012
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Medalball: Moneyball for the olympics: The Olympics are dominated by rich countries with large populations. Nate Silver has three recommendations for small poor countries that want to win olympic medals. First, aspiring countries should invest in sport...

## We used, you know, that statistics thingy

July 23, 2012
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We used, you know, that statistics thingy: Check out the first sentence of the Results in this Abstract. Here’s a link to the full PDF. (Thanks to Victoria S. for the link.)

## Examples of the use of hierarchical modeling to generalize to new settings

July 23, 2012
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In a link to our back-and-forth on causal inference and the use of hierarchical models to bridge between different inferential settings, Elias Bareinboim (a computer scientist who is working with Judea Pearl) writes: In the past week, I have been engaged in a discussion with Andrew Gelman and his blog readers regarding causal inference, selection [...]

## Third year wrap-up

July 23, 2012
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July marks the end of three years of blogging for us. By our count, we've posted 121 examples across the first three years. We aim to be helpful and interesting.As always, it's hard to get a sense of our readership. At the time we wrote this, Feedbur...

## Two Free Sets of Methods Lectures

July 23, 2012
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I provide links to two (free, publicly available) graduate level political methodology classes by Justin Esarey (Rice University) and Gary King (Harvard University). Both classes focus on statistical theory and modeling in R. I encourage you to share this with others and contribute to the conversation at Two Free Sets of Methods Lectures, which first appeared at carlislerainey.com.For more of my thoughts and ideas, subscribe to my blog (via RSS…

## Cognitive Dissonance on the River Tyne

July 23, 2012
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Moritz Stefaner and Stephan Thiel have created a visualization of sensor data acquired by a floating mill on the river Tyne in Newcastle upon Tyne, Great Britain. Their choice of a flow metaphor for non-flow data creates a cognitive dissonance that makes the visualization difficult to understand. The mill itself generates power, and there are sensors that measure a few properties of the water flowing through it: oxygen level, acidity,…

## Announcing eeptools

July 23, 2012
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The LDS_TOOLS package for R has been replaced by the new eeptools package. I am renaming the package for a number of reasons. First, LDS is a technical industry term in education that stands for Longitudinal Data Systems, which is not commonly known an...

## Bayesian Inference Using OpenBUGS

July 23, 2012
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In our previous statistics tutorials, we have treated population parameters as fixed values, and provided point estimates and confidence intervals for them. An alternative approach is the Bayesian statistics. It treats population parameters as random...

## Question questions

July 22, 2012
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Ooooh – new data! There is nothing like a new set of data, just sitting there in the computer, all ready for me to clean and graph and analyse and extract its secrets. I know I should be methodical in … Continue reading →

## Clark Glymour: The Theory of Search Is the Economics of Discovery (part 1)

July 22, 2012
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The Theory of Search Is the Economics of Discovery: Some Thoughts Prompted by Sir David Hendry’s Essay  * in Rationality, Markets and Morals (RMM) Special Topic: Statistical Science and Philosophy of Science Part 1 (of 2) Professor Clark Glymour Alumni University Professor Department of Philosophy[i] Carnegie Mellon University Professor Hendry* endorses a distinction between the “context [...]

## Sunday Data/Statistics Link Roundup (7/22/12)

July 22, 2012
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This paper is the paper describing how Uri Simonsohn identified academic misconduct using statistical analyses. This approach has received a huge amount of press in the scientific literature. The basic approach is that he calculates the standard devia...

## Extreme events as evidence for differences in distributions

July 22, 2012
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I think Lawrence Summers would like this paper by James Hansen, Makiko Sato, and Reto Ruedy (link from Krugman via Palko). Hansen et al. write: The distribution of seasonal mean temperature anomalies has shifted toward higher temperatures and the range of anomalies has increased. An important change is the emergence of a category of summertime [...]

## The Graphical Web Conference 2012

July 22, 2012
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Registration for the The Graphical Web Conference (formerly known as SVGopen) in Zürich Switzerland, Sept. 11-14, is now open and …Continue reading »

## London Olympics and a prediction for the 100m final

July 22, 2012
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It is less than a week before the 2012 Olympic games will start in London. No surprise therefore that the papers are all over it, including a lot of data and statistis around the games. The Economist investigated the potential financial impact on spon...

## Big Data on Campus

July 21, 2012
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Big Data on Campus: Netflix meets Google meets academia. Data mining is reshaping the college experience. Campuses are places of intuition and serendipity: a professor senses confusion on a student’s face and repeats his point; a student majors in p...

## Risks in Big Data Attract Big Law Firms

July 21, 2012
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Risks in Big Data Attract Big Law Firms: Holland & Knight just announced that it was launching a new data privacy and security unit, lead by partners Christopher Cwalina and Steven Roosa, who left Reed Smith to take on the new task. Its unit will b...