VB News – Statwing picks up funding from data science luminary Hammerbacher

March 10, 2014
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VB News – Statwing picks up funding from data science luminary Hammerbacher

From: http://venturebeat.com/2014/01/30/statwing-picks-up-funding-from-data-science-luminary-hammerbacher/Above: A correlation as shown in Statwing's software.Image Credit: StatwingJanuary 30, 2014 3:01 PM Jordan NovetBig data projects are tr...

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Stan Model of the Week: PK Calculation of IV and Oral Dosing

March 10, 2014
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[Update: Revised given comments from Wingfeet, Andrew and germo. Thanks! I'd mistakenly translated the dlnorm priors in the first version --- amazing what a difference the priors make. I also escaped the less-than and greater-than signs in the constraints in the model so they're visible. I also updated to match the thin=2 output of JAGS.] […]The post Stan Model of the Week: PK Calculation of IV and Oral Dosing appeared…

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Preregistration: what’s in it for you?

March 10, 2014
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Chris Chambers pointed me to a blog by someone called Neuroskeptic who suggested that I preregister my political science studies: So when Andrew Gelman (let’s say) is going to start using a new approach, he goes on Twitter, or on his blog, and posts a bare-bones summary of what he’s going to do. Then he […]The post Preregistration: what’s in it for you? appeared first on Statistical Modeling, Causal Inference,…

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On deck this week: Things people sent me

March 10, 2014
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Mon: Preregistration: what’s in it for you? Tues: What if I were to stop publishing in journals? Wed: Empirical implications of Empirical Implications of Theoretical Models Thurs: An Economist’s Guide to Visualizing Data Fri: The maxim...

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Spatial perception: on the chart and in real life

March 10, 2014
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Spatial perception: on the chart and in real life

A twitter follower @mdjoner felt that something is amiss with the squares in this chart comparing real estate prices in major cities around the world. I'm not sure where the chart originally came from but there is a CNBC icon....

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Man at work(-ish)

March 10, 2014
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Man at work(-ish)

Perhaps one could argue that the obvious, manly activity to do at the weekend when you're home alone is to put and organise stuff in the garage. Well, I was home alone last weekend and my very own version of this was to arxiv the first p...

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How to get started with SAS: Free videos for beginners

March 10, 2014
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How to get started with SAS: Free videos for beginners

On most Mondays I blog about a function, programming technique, or resource that is useful for programmers who are getting started with SAS software. Recently I learned that my colleagues in the SAS education division have been hard at work developing a series of short videos that explain basic tasks [...]

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Using old versions of R packages

March 10, 2014
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Using old versions of R packages

I received this email yesterday: I have been using your ‘forecast’ package for more than a year now. I was on R version 2.15 until last week, but I am having issues with lubridate package, hence decided to update R version to R 3.0.1. In our organization even getting an open source application require us to go through a whole lot of approval processes. I asked for R 3.0.1, before…

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Intraday data

March 10, 2014
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Intraday data

In the Intraday Backtest post I showed an example of loading and working with Forex Intraday data from the FXHISTORICALDATA.COM. Recently, I came across another interesting source of Intraday data at the Bonnot Gang site. Please note that you will have to register to get access to the Intraday data; the registration is free. Today, […]

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Hipmunk worked

March 9, 2014
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In the past I’ve categorized Hipmunk as a really cool flight-finder that doesn’t actually work, as worse than Expedia, and as graphics without content. So, I thought it would be only fair to tell you that I bought a flight the other day using Hipmunk and it gave me the same flight as Expedia but […]The post Hipmunk worked appeared first on Statistical Modeling, Causal Inference, and Social Science.

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Testing for Multivariate Normality

March 9, 2014
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Testing for Multivariate Normality

In a recent post I commented on the connection between the multivariate normal distribution and marginal distributions that are normal. Specifically, the latter do not necessarily imply the former.So, let's think about this in terms of testing for norm...

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Loss‐Efficient Factor Selection

March 9, 2014
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Alexi Onatski has an interesting recent paper, "Asymptotic Analysis of the Squared Estimation Error in Misspecified Factor Models." There's also an Appendix.Four interesting cases have emerged in the literature, corresponding to two types of ...

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Reviewing the peer review process?

March 9, 2014
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I received the following email: Dear Colleague, Recently we informed you about SciRev, our new website where researchers can share their experiences with the peer review process and select an efficient journal for submitting their work. Since our start, we already received over 500 reviews and many positive reactions, which reveal a great need for […]The post Reviewing the peer review process? appeared first on Statistical Modeling, Causal Inference, and…

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Money(proper foot)ball?

March 9, 2014
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Money(proper foot)ball?

This is an interesting (although a bit overused, of late) topic. In some quarters, we statisticians are all akin to "moneyballs" (by the way: I should say I haven't read the book or watched the movie $-$ but that's by design, as I suspect I wouldn't re...

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PK calculation of IV and oral dosing in JAGS

March 9, 2014
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PK calculation of IV and oral dosing in JAGS

I am examining IV and oral dosing of problem of Chapter 6, Question 6 or Roland and Tozer Rowland and Tozer (Clinical pharmacokinetics and pharmacodynamics, 4th edition) with Jags. In this problem one subject gets an IV and an oral dose.DataThe data lo...

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Andrew Gelman, the Early Years

March 9, 2014
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Andrew Gelman reminisced recently some early research (see here, here, and here). One of those earlier links mentioned a conference Gelman went early in his career which included Jaynes. I have the proceedings to that conference and was able to grab th...

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Can a classifier that never says “yes” be useful?

March 8, 2014
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Can a classifier that never says “yes” be useful?

Many data science projects and presentations are needlessly derailed by not having set shared business relevant quantitative expectations early on (for some advice see Setting expectations in data science projects). One of the most common issues is the common layman expectation of “perfect prediction” from classification projects. It is important to set expectations correctly so […] Related posts: Setting expectations in data science projects More on ROC/AUC On Being a…

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Recent Advances in Bayesian Inference at U.C. Irvine, March 14

March 8, 2014
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Recent Advances in Bayesian Inference at U.C. Irvine, March 14

Recent Advances in Bayesian InferenceVenue:University of California at Irvine,1517 Social and Behavioral Sciences Gateway buildingDate:Friday, March 14, 2014Speakers:9:30 John Kruschke (Indiana University). Precision as the goal for data collection.10:...

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Disagreeing to disagree

March 8, 2014
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Disagreeing to disagree

I was going to post yet one more discussion of our discussion of the discussion of the discussion of some paper that I don’t really care about, but then I was like, aaaahh, what’s the point? So instead here’s a pointer to the first paper I ever published. It’s the very last one on this […]The post Disagreeing to disagree appeared first on Statistical Modeling, Causal Inference, and Social Science.

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Short Review: How Children Succeed

March 8, 2014
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How Children Succeed: Grit, Curiosity, and the Hidden Power of Character by Paul Tough Unless your definition of children includes college students, the second word of the title is a misnomer. This book is about how young people, from infants to colleg...

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Short Review: How Children Succeed

March 8, 2014
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How Children Succeed: Grit, Curiosity, and the Hidden Power of Character by Paul Tough Unless your definition of children includes college students, the second word of the title is a misnomer. This book is about how young people, from infants to colleg...

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Applied Statistics Lesson of the Day – Additive Models vs. Interaction Models in 2-Factor Experimental Designs

Applied Statistics Lesson of the Day – Additive Models vs. Interaction Models in 2-Factor Experimental Designs

In a recent “Machine Learning Lesson of the Day“, I discussed the difference between a supervised learning model in machine learning and a regression model in statistics.  In that lesson, I mentioned that a statistical regression model usually consists of a systematic component and a random component.  Today’s lesson strictly concerns the systematic component. An […]

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Ever wonder how popular your favorite R functions are?

March 8, 2014
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Ever wonder how popular your favorite R functions are?

How's that fried pickle sandwich treating you?  Perhaps your taste in R  functions are less bizarre than your taste in R commands?Now you can easily find out using this new shiny app!  In this post I use the R function frequency table co...

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