Struggles over the criticism of the “cannabis users and IQ change” paper

June 22, 2013
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Ole Rogeberg points me to a discussion of a discussion of a paper: Did pre-release of my [Rogeberg's] PNAS paper on methodological problems with Meier et al’s 2012 paper on cannabis and IQ reduce the chances that it will have its intended effect? In my case, serious methodological issues related to causal inference from non-random [...]The post Struggles over the criticism of the “cannabis users and IQ change” paper appeared…

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Great Firewall of China

June 21, 2013
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Great Firewall of China

After spending the last few months in China and not able to see or post at my own blog,  this site seems dead. For a long while the famous Great FireWall of China has been blocking access to all wordpress.com traffics. Computers in China have hard time to gain access to webpages with domain names, […]

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The pretender

June 21, 2013
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The pretender

Tonight I'll pretend to still be very, very young and go catch a Ryanair flight from Stansted, so that I can be all revenge-y at my brother's stag do, tomorrow morning. I have pointedly avoided Ryanair for quite a while now, on the grounds that as...

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Bayes 250 – as it happened

June 21, 2013
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Bayes 250 – as it happened

I was going to post some impressions on the two-day Bayes 250 conference, but Christian beat me to it with his perfect recollection of the event.I thought it was a good workshop with interesting talks and an occasion for camaraderie. I e...

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Why faking data is bad …

June 21, 2013
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Why faking data is bad …

It never occurred to me until today to write a post about why faking data is bad. However, I noticed an interesting exchange on Andrew Gelman's blog (see the comments on this post about Marc Hauser). One commenter argued that it was not clear that Haus...

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Interview with Miriah Meyer – Microsoft Faculty Fellow and Visualization Expert

June 21, 2013
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Interview with Miriah Meyer – Microsoft Faculty Fellow and Visualization Expert

Miriah Meyer received her Ph.D. in computer science from the University of Utah, then did a postdoctoral fellowship at Harvard University and was a visiting fellow at MIT and the Broad Institute. Her research focuses on developing visualization tools in … Continue reading →

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Job openings at conservative political analytics firm!

June 21, 2013
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Job openings at conservative political analytics firm!

After posting that announcement about Civis Analytics, I wrote, “If a reconstituted Romney Analytics team is hiring, let me know and I’ll post that ad too.” Adam Schaeffer obliged: Not sure about Romney’s team, but Evolving Strategies is looking for sharp folks who lean right: Evolving Strategies is a political communications research firm specializing in [...]The post Job openings at conservative political analytics firm! appeared first on Statistical Modeling, Causal…

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Interpreting interactions in discrete-data regression

June 21, 2013
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Mike Johns writes: Are you familiar with the work of Ai and Norton on interactions in logit/probit models? I’d be curious to hear your thoughts. Ai, C.R. and Norton E.C. 2003. Interaction terms in logit and probit models. Economics Letters 80(1): 123-129. A peer ref just cited this paper in reaction to a logistic model [...]The post Interpreting interactions in discrete-data regression appeared first on Statistical Modeling, Causal Inference, and…

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Management as popularity contest

June 21, 2013
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One of the unlikely areas in which data science has played a role is employee management. New York Times has an informative interview with Laszlo Bock, an SVP at Google. (link). Here's Bock on the famous brainteasers used in Google interviews: On the hiring side, we found that brainteasers are a complete waste of time. How many golf balls can you fit into an airplane? How many gas stations in…

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Bayesian estimation supersedes the t-test – Online

June 20, 2013
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Bayesian estimation supersedes the t-test – Online

The t-test is probably the most used and abused statistical test in research [Citation Needed]. The t-test is used when you have two groups of measures and you want to look at the difference between the groups and the original t-test assumes that the...

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Bayesian Modeling of Anscombe’s Quartet

June 20, 2013
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Bayesian Modeling of Anscombe’s Quartet

Anscombe’s quartet is a collection of four datasets that look radically different yet result in the same regression line when using ordinary least square regression. The graph below shows Anscombe’s quartet with imposed regression lines (taken fr...

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Google’s brainteasers (that don’t work) and Johns Hopkins Biostatistics Data Analysis

June 20, 2013
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Google’s brainteasers (that don’t work) and Johns Hopkins Biostatistics Data Analysis

This article is getting some attention, because Google's VP for people operations at Google has made public a few insights that the Google HR team has come to over the last several years. The most surprising might be: They don't … Continue reading →

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Amazing retro gnu graphics!

June 20, 2013
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Amazing retro gnu graphics!

Bill Harris writes: Speaking of strange graphics, http://makingsense.facilitatedsystems.com/2007/03/making-musical-sense-by-email-part-2.html shows an example of text (gnuplot’s dumb terminal) graphics of data from MCSim (code and other material available from http://makingsense.facilitatedsystems.com/2007/03/making-musical-sense-by-email-table-of.html). At another extreme, slide 20 of https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnx3c2hhcnJpczEzfGd4OjZkNGFjZWZhOTAyYTFkMDg shows a stereogram of more MCSim output (I was a bit more naive back then). I included the stereogram as [...]The post Amazing retro gnu graphics! appeared first on Statistical Modeling, Causal Inference, and Social…

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SIMPSON’S PARADOX EXPLAINED

June 20, 2013
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SIMPSON’S PARADOX EXPLAINED

SIMPSON’S PARADOX EXPLAINED Imagine a treatment with the following properties: The treatment is good for men (E1) The treatment is good for women (E2) The treatment bad overall (E3) That’s the essence of Simpson’s paradox. But there is no such treatment. Statements (E1), (E2) and (E3) cannot all be true simultaneously. Simpson’s paradox occurs when […]

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Useful Softwares for Research

June 20, 2013
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Useful Softwares for Research

I took a session on ‘Useful software for research’ for the new batch of research scholars. I hope sharing the slides useful to other research students. The software suggestions were sorted based on my experience and colleagues’ experiences. The presentation … Continue reading → The post Useful Softwares for Research appeared first on Fiddling with data and code.

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Stanley Young: better p-values through randomization in microarrays

June 19, 2013
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Stanley Young: better p-values through randomization in microarrays

I wanted to locate some uncluttered lounge space for one of the threads to emerge in comments from 6/14/13. Thanks to Stanley Young for permission to post this.   S. Stanley Young, PhD Assistant Director for Bioinformatics National Institute of Statistical Sciences Research Triangle Park, NC There is a relatively unknown problem with microarray experiments, in […]

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Infographics and ISOTYPE and NSIs

June 19, 2013
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Infographics and ISOTYPE and NSIs

ISOTYPE Good infographics for statistical matters do not only need diagrams (like histograms or bar charts) but also lots of …Continue reading »

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“Behind a cancer-treatment firm’s rosy survival claims”

June 19, 2013
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Brett Keller points to a recent news article by Sharon Begley and Robin Respaut: A lot of doctors, hospitals and other healthcare providers in the United States decline to treat people who can’t pay, or have inadequate insurance, among other reasons. What sets CTCA [Cancer Treatment Centers of America] apart is that rejecting certain patients [...]The post “Behind a cancer-treatment firm’s rosy survival claims” appeared first on Statistical Modeling, Causal…

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Hard work pays off

June 19, 2013
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Hard work pays off

At the NY Tech Meetup, Andrei Scheinkman showed off some work his team at Huffington Post did relating to gun violence in America. Interactive version is here. The animation shows day by day, where the victims of gun violence were...

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Macros and loops in the SAS/IML language

June 19, 2013
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Macros and loops in the SAS/IML language

I am not a big fan of the macro language, and I try to avoid it when I write SAS/IML programs. I find that the programs with many macros are hard to read and debug. Furthermore, the SAS/IML language supports loops and indexing, so many macro constructs can be replaced [...]

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Le Monde puzzle [#825]

June 18, 2013
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Le Monde puzzle [#825]

Yet another puzzle which first part does not require R programming, even though it is a programming question in essence: Given five real numbers x1,…,x5, what is the minimal number of pairwise comparisons needed to rank them? Given 33 real numbers, what is the minimal number of pairwise comparisons required to find the three largest ones? […]

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Creating a wordpress single or multisite install using cloudformation and ansible

June 18, 2013
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Creating a wordpress single or multisite install using cloudformation and ansible

Intro I recently had to create some sites quickly. After evaluating a few options, setting up a wordpress multisite seemed like a good option. In order to make this change, I setup a wordpress multisite installation with domain mapping. A multisite...

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re:log: Tracking the Movements of Conference Attendees via WiFi

June 18, 2013
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re:log: Tracking the Movements of Conference Attendees via WiFi

re:log [opendatacity.de] by German data designers OpenDataCity reveals the movements of about 6,700 different electronic devices during re:publica 2013, a prestigious European conference on the topic of Digital Society. A dynamic map of the conferenc...

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