Forthcoming paper on the strong likelihood principle

November 4, 2013
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Forthcoming paper on the strong likelihood principle

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, […]

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Create mosaic plots in SAS by using PROC FREQ

November 4, 2013
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Create mosaic plots in SAS by using PROC FREQ

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 [...]

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Spatial Clustering With Equal Sizes

November 4, 2013
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Spatial Clustering With Equal Sizes

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 […]

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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 →

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About blogging

November 4, 2013
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About blogging

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 →

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

November 3, 2013
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Unusual timing shows how random mass murder can be (or not)

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 […]

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

November 3, 2013
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The Rise, Fall and Rise of English Triple Crown Racing Speeds

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...

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

November 3, 2013
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The Employment Nondiscrimination Act is overwhelmingly popular in nearly every one of the 50 states

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…

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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…

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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...

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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...

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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 ...

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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 ...

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Weekend Reading: Market Neutral

November 2, 2013
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Weekend Reading: Market Neutral

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 […]

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Le Monde puzzle [#838]

November 1, 2013
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Le Monde puzzle [#838]

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 […]

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Charts that changed the world—way before big data

November 1, 2013
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Charts that changed the world—way before big data

   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...

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Doing Data Science: What’s it all about?

November 1, 2013
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Doing Data Science:  What’s it all about?

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…

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UK Government publishes data capability strategy

November 1, 2013
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UK Government publishes data capability strategy

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...

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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...

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Nonparametric Regression, ABC and CNN

October 31, 2013
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Nonparametric Regression, ABC and CNN

On Monday we had an interesting seminar by Samory Kpotufe on nonparametric regression. Samory presented a method for choosing the smoothing parameter, locally, in nonparametric regression. The method is simple and intuitive: construct confidence intervals using many different values of the smoothing parameter. Choose the value at which the confidence intervals stop intersecting. He has […]

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Nonparametric Regression, ABC and CNN

October 31, 2013
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Nonparametric Regression, ABC and CNN

On Monday we had an interesting seminar by Samory Kpotufe on nonparametric regression. Samory presented a method for choosing the smoothing parameter, locally, in nonparametric regression. The method is simple and intuitive: construct confidence intervals using many different values of the smoothing parameter. Choose the value at which the confidence intervals stop intersecting. He has […]

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WHIPPING BOYS AND WITCH HUNTERS

October 31, 2013
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WHIPPING BOYS AND WITCH HUNTERS

This, from 2 years ago, “fits” at least as well today…HAPPY HALLOWEEN! Memory Lane In an earlier post I alleged that frequentist hypotheses tests often serve as whipping boys, by which I meant “scapegoats”, for the well-known misuses, abuses, and flagrant misinterpretations of tests (both simple Fisherian significance tests and Neyman-Pearson tests, although in different ways).  […]

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Creating Knowledge out of Interlinked Data – STATISTICAL OFFICE WORKBENCH

October 31, 2013
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From: http://www.slideshare.net/lod2project/lod2-webinar-series-3rd-relase-of-the-stack

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