## Archival and analysis of #GI2013 Tweets

November 4, 2013
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I archived and analyzed all Tweets containing #GI2013 from the recent Cold Spring Harbor Genome Informatics meeting, using my previously described code.Friday was the most Tweeted day. Perhaps this was due to Lior Pachter's excellent keynote, "Stories ...

## Excel Chart Demo

November 4, 2013
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As an illustration of how Sharp Statistics can integrate extra analysis tools into Excel there is now a demonstration Excel Add In that can be download and installed to produce some useful statistical plots of your data. It can produce 3 simple statist...

## Federal Reserve Bank of Philadelphia Launches Improved U.S. GDP Growth Series

November 4, 2013
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Exciting news for empirical macroeconomics and finance: The Federal Reserve Bank of Philadelphia today released a new and improved $$GDP$$ growth series, $$GDPplus$$. It's an optimal blend of the BEA's expenditure-side and income-side estimates (c...

## Recently in the sister blog

November 4, 2013
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This one’s probably the most important: Republicans on track to retain control of House in 2014 And I like this one for the headline: Impact factor 911 is a joke Here are the others: Press releases make for fishy statistics Why is the Motley Fool hyping Netflix? Our health-care system is like Coca Cola Obama […]The post Recently in the sister blog appeared first on Statistical Modeling, Causal Inference, and…

## Forthcoming paper on the strong likelihood principle

November 4, 2013
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My paper, “On the Birnbaum Argument for the Strong Likelihood Principle” has been accepted by Statistical Science. The latest version is here. (It differs from all versions posted anywhere). If you spot any typos, please let me know (error@vt.edu). If you can’t open this link, please write to me and I’ll send it directly. As always, […]

## Create mosaic plots in SAS by using PROC FREQ

November 4, 2013
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Mosaic plots (Hartigan and Kleiner, 1981; Friendly, 1994, JASA) are used for exploratory data analysis of categorical data. Mosaic plots have been available for decades in SAS products such as JMP, SAS/INSIGHT, and SAS/IML Studio. However, not all SAS customers have access to these specialized products, so I am pleased [...]

## Spatial Clustering With Equal Sizes

November 4, 2013
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This is a problem I have encountered many times where the goal is to take a sample of spatial locations and apply constraints to the algorithm.  In addition to providing a pre-determined number of K clusters a fixed size of elements needs to be held constant within each cluster. An application of this algorithm is […]

## Sunday data/statistics link roundup (11/3/13)

November 4, 2013
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There has been a big knockdown-dragout battle in the blogosphere over how GTEX is doing their analysis. Read the original post here, my summary here, and the response from GTEX here. I agree that the criticism bordered on hyperbolic but also think … Continue reading →

November 4, 2013
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This is the 100th post on “Learn and Teach Statistics and Operations Research”. To celebrate, I am writing about the joys of blogging. Anyone with an internet connection can blog these days, and do! It is the procrastinator’s “dark playground” … Continue reading →

## Unusual timing shows how random mass murder can be (or not)

November 3, 2013
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This was one headline in the USA Today I picked from the hotel lobby on my way to Pittsburgh airport and then Toronto this morning. The unusual pattern was about observing four U.S. mass murders happening within four days, “for the first time in at least seven years”. The article did not explain why this […]

## The Rise, Fall and Rise of English Triple Crown Racing Speeds

November 3, 2013
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A horse with a crimson “6” displayed on either side of its girth processes to the parade ring. There are people milling about, looking over “Six” as well as the other entrants for the 2013 running of the St. Leger Stakes. Alongside Si...

## The Employment Nondiscrimination Act is overwhelmingly popular in nearly every one of the 50 states

November 3, 2013
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The above graph shows the estimated support, by state, for the Employment Nondiscrimination Act, a gay rights bill that the Senate will be voting on this Monday. The estimates were constructed by Kate Krimmel, Jeff Lax, and Justin Phillips using multilevel regression and poststratification. Check out that graph again. The scale goes from 20% to […]The post The Employment Nondiscrimination Act is overwhelmingly popular in nearly every one of the…

## How best to compare effects measured in two different time periods?

November 3, 2013
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I received the following email from someone who wishes to remain anonymous: My colleague and I are trying to understand the best way to approach a problem involving measuring a group of individuals’ abilities across time, and are hoping you can offer some guidance. We are trying to analyze the combined effect of two distinct […]The post How best to compare effects measured in two different time periods? appeared first…

## Statistical aspects of two-way cross-over studies

November 3, 2013
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I ran into this presentation on Statistical aspects of two-way cross-over studies by Ing. Helmut Schütz (http://bebac.at). He presented some code and referred to the bear package. The bear package is menu driven, which is not my thing. I had...

## Bayes Theorem and Quantum Mechanics

November 3, 2013
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I was reminded of this old post by Andrew Gelman about whether Quantum Mechanics requires a change in the axioms of probability theory. Without weighing in I’ll just point out that Bayesian Statistics is more general than Bayes Theorem and this a...

## I’ve already written next year’s April Fools post!

November 2, 2013
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Good to have gotten that one out of the way already. (Actually, I wrote it a few months ago. This post is itself in the monthlong+ queue.) I don’t know how easy it is to search this blog by date to find the Fools posts from previous years. The ...

## I’ve already written next year’s April Fools post!

November 2, 2013
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Good to have gotten that one out of the way already. (Actually, I wrote it a few months ago. This post is itself in the monthlong+ queue.) I don’t know how easy it is to search this blog by date to find the Fools posts from previous years. The ...

November 2, 2013
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I recently came across a very interesting idea at the The Problem with Market Neutral (and an Answer) post by Mebane Faber. Today I want to show how you can test such strategy using the Systematic Investor Toolbox: Mebane thank you very much for sharing this great observation and great strategy that works! I would […]

## Le Monde puzzle [#838]

November 1, 2013
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Another one of those Le Monde mathematical puzzles which wording is confusing to me: The 40 members of the Academy vote for two prizes. [Like the one recently attributed to my friend and coauthor Olivier Cappé!] Once the votes are counted for both prizes, it appears that the total votes for each of the candidates […]

## Charts that changed the world—way before big data

November 1, 2013
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Text Size   Published: Thursday, 31 Oct 2013 | 7:00 AM ETBy: Eric Rosenbaum | CNBC.comTwitter47LinkedIn186ShareSource: Tableau SoftwareDetail of Ignaz Semmelweis’s germ theory data chartSome years ago I was sent...

## Doing Data Science: What’s it all about?

November 1, 2013
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Rachel Schutt and Cathy O’Neil just came out with a wonderfully readable book on doing data science, based on a course Rachel taught last year at Columbia. Rachel is a former Ph.D. student of mine and so I’m inclined to have a positive view of her work; on the other hand, I did actually look […]The post Doing Data Science: What’s it all about? appeared first on Statistical Modeling, Causal…

## UK Government publishes data capability strategy

November 1, 2013
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From: StatsLifeWritten by Web News Editor on 31 October 2013. Posted in NewsThe government, in partnership with the recently formed Information Economy Council, has just published its Data Capability Strategy, which outlin...

## LaTeX/MathJax Rendering in Blog Posts

November 1, 2013
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It seems that LaTeX/MathJax is working fine with my blog, including with mobile devices, which is great (see, for example, my recent post On the Wastefulness of (Pseudo-) Out-of-Sample Predictive Model Comparisons). However, a problem exists for t...