A day with the news!

November 8, 2013
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A day with the news!

One great thing about working in statistics and political science is, between them, these two subjects are connected to just about everything. From the day’s news (sort of): Pat Robertson Thinks Low-Carb Diets Violate God’s Principles: I wonder what Art De Vany will think of this. I had the impression that lo-carb is vaguely connected […]The post A day with the news! appeared first on Statistical Modeling, Causal Inference, and…

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Financial Data Accessible from R – part III

November 8, 2013
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I came across a new source of data which I think is really worth sharing: ThinkNum. It gathers around 2,000 sources of data but more importantly it allows the user to manipulate this data via functions and graphics and there is an R package available on CRAN. Interested readers can find a very good post […]

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Rescue remedy

November 7, 2013
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Rescue remedy

Interesting day, today. I woke up really early (3.45am) to catch my flight to Amsterdam to give my talk at the Chemometrics Workshop. The cab got me to the airport early enough so that I could clear security, have a coffee and slowly make my way to the...

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Replication of few graphs/charts in base R, ggplot2, and rCharts

November 7, 2013
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UPDATE: THE BLOG/SITE HAS MOVED TO GITHUB. THE NEW LINK FOR THE BLOG/SITE IS patilv.github.io and THE LINK TO THIS POST IS: http://bit.ly/1jJ6f7v. PLEASE UPDATE ANY BOOKMARKS YOU MAY HAVE.In this post, I use a simulated dataset (7 variables -3 factor a...

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The e-Writing Jungle Part 1: LaTeX to pdf to the Web

November 7, 2013
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LaTeX and MathML and MathJax and Python and Sphinx and IPython and R and Knitter and Firefox and Chrome and ...My head is spinning with all this stuff. Maybe yours is too.One thing is clear: The traditional academic book publishing paradigm (broadly de...

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I’m negative on the expression “false positives”

November 7, 2013
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After seeing a document sent to me and others regarding the crisis of spurious, statistically-significant research findings in psychology research, I had the following reaction: I am unhappy with the use in the document of the phrase “false positives.” I feel that this expression is unhelpful as it frames science in terms of “true” and […]The post I’m negative on the expression “false positives” appeared first on Statistical Modeling, Causal…

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Nix on the expression “false positives”

November 7, 2013
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After seeing a document sent to me and others regarding the crisis of spurious, statistically-significant research findings in psychology research, I had the following reaction: I am unhappy with the use in the document of the phrase “false positives.” I feel that this expression is unhelpful as it frames science in terms of “true” and […]The post Nix on the expression “false positives” appeared first on Statistical Modeling, Causal Inference,…

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Data visualizations gone beautifully wrong

November 7, 2013
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Jeremy Fox points us to this compilation of data visualizations in R that went wrong, in a way that ended up making them look like art. They are indeed wonderful. The post Data visualizations gone beautifully wrong appeared first on Statistical Modelin...

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Light entertainment: when up is down (double bill)

November 7, 2013
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Light entertainment: when up is down (double bill)

Abhinav takes us to this chart: Only in politics. *** A co-worker reminds me of this gem by Fox News a few years back:

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Tapestry 2014 Announced

November 7, 2013
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Tapestry 2014 Announced

After a very successful Tapestry conference in February this year, we have been getting a steady stream of questions from people about another event next year. Now we're finally able to announce next year's event. And it will be awesome, again.

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“Marginally significant”

November 6, 2013
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“Marginally significant”

Jeremy Fox writes: You’ve probably seen this [by Matthew Hankins]. . . . Everyone else on Twitter already has. It’s a graph of the frequency with which the phrase “marginally significant” occurs in association with different P values. Apparently it’s real data, from a Google Scholar search, though I haven’t tried to replicate the search […]The post “Marginally significant” appeared first on Statistical Modeling, Causal Inference, and Social Science.

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Correspondence Analysis in R

November 6, 2013
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Correspondence Analysis in R

Correspondence analysis (from a layman’s perspective) is like principal components analysis for categorical data. It can be useful to discover structure in this type of data. My friend Gianmarco Alberti, an archaeologist, has put together an in depth web site … Continue reading →

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A Mitochondrial Manhattan Plot

November 6, 2013
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A Mitochondrial Manhattan Plot

Manhattan plots have become the standard way to visualize results for genetic association studies, allowing the viewer to instantly see significant results in the rough context of their genomic position.  Manhattan plots are typically shown on a l...

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If we observed p_hat = .46, why do we use p=.5?

November 6, 2013
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I aim to commit statistical sin. I’m going to accept the null hypothesis for no other reason than because I “failing to reject it”. Having tarnished my reputation with that, I’ll finish by ignoring the only data available and ba...

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How to specify mosaic plot colors in SAS

November 6, 2013
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How to specify mosaic plot colors in SAS

The mosaic plot is a graphical visualization of a frequency table. In a previous post, I showed how to use the FREQ procedure to create a mosaic plot. This article shows how to create a mosaic plot by using the MOSAICPARM statement in the graph template language (GTL). (The MOSAICPARM [...]

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R: Mapping Philippine Earthquakes (October 2013)

November 6, 2013
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R: Mapping Philippine Earthquakes (October 2013)

Last month, October 15, 2013 around 8:12 am (Philippine Time), a magnitude 7.2 earthquake hit Bohol island, detroying several infrastructures and killing hundreds of residents. The Philippine Institute of Volcanology and Seismology or PhiVolcs recorde...

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Bayesian Biostatistics 2014

November 5, 2013
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This has to do with the ISBA Biostats section (I suppose it will be even more, if I am elected to the post of Program Chair, but I'll try and be involved even if I don't win!): the next Bayesian Biostatistics Conference has just been announced and will...

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WSJ tells stories about working women

November 5, 2013
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WSJ tells stories about working women

Over twitter, Jeff Harrison @mrjeffharrison shouted "Story time!" at this Wall Street Journal report on a Citibank/LinkedIn survey of working men and women. "Story time" is the trick of reporting some statistics, then spinning a story that has little or nothing to do with the data just presented. This tactic is effective as some readers erroneously assume that the story is supported by the data. A good illustration is this…

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Pricing reinsurance contracts, another case study

November 5, 2013
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Pricing reinsurance contracts, another case study

A reinsurance case study for tomorrow’s class. The goal will be to price some nonproportional reinsurance contract, for business interruption claims. Consider the following dataset, > library(gdata) > db=read.xls( + "http://perso.univ-rennes1.fr/arthur.charpentier/SIN_1985_2000-PE.xls", + sheet=1) Content type 'application/vnd.ms-excel' length 183808 bytes (179 Kb) open URL ================================================== downloaded 179 Kb As for any (standard) insurance contract, there are two parts in the pricing the expected number of claims the average cost of individual…

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How to Host a Conference on Google Hangouts on Air

November 5, 2013
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We recently hosted the first ever Simply Statistics Unconference on the Future of Statistics. In preparing for the event, we learned a lot about how to organize such an event and frankly we wished there had been a bit more … Continue reading →

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How much do we trust a new claim that early childhood stimulation raised earnings by 42%?

November 5, 2013
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Hal Pashler wrote in about a recent paper, “Labor Market Returns to Early Childhood Stimulation: a 20-year Followup to an Experimental Intervention in Jamaica,” by Paul Gertler, James Heckman, Rodrigo Pinto, Arianna Zanolini, Christel Vermeerch, Susan Walker, Susan M. Chang, and Sally Grantham-McGregor. Here’s Pashler: Dan Willingham tweeted: @DTWillingham: RCT from Jamaica: Big effects 20 […]The post How much do we trust a new claim that early childhood stimulation raised…

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What’s in a cronut? Let me find out

November 5, 2013
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What’s in a cronut? Let me find out

Reader Ross S. did not join the line for this cronut, illustrating the popularity of different makers of tracking software on 1.3 million websites. Original by Analytics SEO is here. *** The biggest beef I have with this cronut is...

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Typos in BMHE

November 5, 2013
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Typos in BMHE

No matter how many times you check and no matter how good the publishers are, I'm guessing there's no way out of getting typos in a publication, especially if it's a relatively long one, such as a book.I've just discovered a couple in BMHE, which I tho...

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