## Welcome

August 14, 2014
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Junk Charts is made by Kaiser Fung, the Web’s first data visualization critic. I discuss what makes graphics work, and how to make them better. Think chartjunk + junk art. Here is my first post from nine years ago. These...

## Intuition and Data at KeenCON

August 14, 2014
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-+*I will be giving a talk “Bayesian statistics as a way to integrate intuition and data” at KeenCon, September 11, 2014 in San Francisco. Update: Use promo code KeenCon-JohnCook to get 75% off registration.

## new laptop with ubuntu 14.04

August 13, 2014
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As I was getting worried about the chances of survival of my current laptop (bought in emergency upon my return from Kyoto!), I decided to use some available grant money to buy a new laptop without stepping through the emergency square. Thanks to my local computer engineer, Thomas, I found a local dealer selling light […]

## swirl and the little data scientist’s predicament

August 13, 2014
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Editor's note: This is a repost of "R and the little data scientist's predicament". A brief idea for an update is presented at the end in italics.  I just read this fascinating post on _why, apparently a bit of a cult hero … Continue reading →

## oneSecond: Printing Every Tweet Created During a Single Second

August 13, 2014
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#oneSecond [philippadrian.com] by graphic design student Philipp Adrian aggregates all the tweets sent at exactly 14:47:36 GMT of 9 November 2012. The 5522 Twitter messages are categorized and ordered in 4 different books. Every user is part of each...

## Davenport on targeted marketing

August 13, 2014
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Tom Davenport is one of the leading voices on business analytics, and he has a new piece titled "Why are most 'targeted' marketing offers so bad?" in which he expanded on a question I raised in my HBR article. Tom's book Competing on Analytics is a classic. He has a great appreciation for the business of the data business. In the new feature, Davenport classifies marketing offers he gets into…

## Updike and O’Hara

August 13, 2014
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I just read this review by Louis Menand of a biography of John Updike. Lots of interesting stuff here, with this, perhaps, being the saddest: When Updike received the National Book Foundation Medal for Distinguished Contribution to American Letters, in 1998, two of [his second wife's] children were present, but his were not invited. Menand’s […] The post Updike and O’Hara appeared first on Statistical Modeling, Causal Inference, and Social…

## Guiding numerical integration: The PEAK= option in the SAS/IML QUAD subroutine

August 13, 2014
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One of the things I enjoy about blogging is that I often learn something new. Last week I wrote about how to optimize a function that is defined in terms of an integral. While developing the program in the article, I made some mistakes that generated SAS/IML error messages. By […]

## Applied Statistics Lesson of the Day – The Coefficient of Variation

$Applied Statistics Lesson of the Day – The Coefficient of Variation$

In my statistics classes, I learned to use the variance or the standard deviation to measure the variability or dispersion of a data set.  However, consider the following 2 hypothetical cases: the standard deviation for the incomes of households in Canada is \$2,000 the standard deviation for the incomes of the 5 major banks in Canada […]

## Visit of Di Cook

August 12, 2014
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Next week, Professor Di Cook from Iowa State University is visiting my research group at Monash University. Di is a world leader in data visualization, and is especially well-known for her work on interactive graphics and the XGobi and GGobi software. See her book with Deb Swayne for details. For those wanting to hear her speak, read […]

## Bangalore workshop [ಬೆಂಗಳೂರು ಕಾರ್ಯಾಗಾರ] and new book

August 12, 2014
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On the last day of the IFCAM workshop in Bangalore, Marc Lavielle from INRIA presented a talk on mixed effects where he illustrated his original computer language Monolix. And mentioned that his CRC Press book on Mixed Effects Models for the Population Approach was out! (Appropriately listed as out on a 14th of July on […]

## How do you interpret standard errors from a regression fit to the entire population?

August 12, 2014
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James Keirstead writes: I’m working on some regressions for UK cities and have a question about how to interpret regression coefficients. . . . In a typical regression, one would be working with data from a sample and so the standard errors on the coefficients can be interpreted as reflecting the uncertainty in the choice […] The post How do you interpret standard errors from a regression fit to the…

## The A. R. Bergstrom Prize in Econometrics, 2015

August 12, 2014
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A. R. (Rex) Bergstrom can reasonably be regarded as the "father" of modern econometrics in New Zealand. He made seminal contributions to continuous-time econometrics and the finite-sample properties of simultaneous equations estimators. He also taught ...

## Stopping and testing intentions in p values

August 12, 2014
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An emailer asks:I am really interested in Bayesian analysis, but I don't get the issue of sampling intention being so important in frequentist t-tests; if you have 60 values you have 60 values surely - why does your intention matter? The computer does ...

## Charting Culture: 2000 Years of Cultural History in 5 Minutes

August 12, 2014
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Charting Culture [nature.com] shows the geographical movements of over 120,000 individuals who were notable enough in their life-times that the dates and locations of their births and deaths were recorded. The animation commences around 600 bc and e...

## The Leek group guide to giving talks

August 12, 2014
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I wrote a little guide to giving talks that goes along with my data sharing , R packages, and reviewing guides. I posted it to Github and would be really happy to take any feedback/pull requests that folks might have. If … Continue reading →

## Knoxville R Users’ Group Meets September 3rd

August 12, 2014
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The Knoxville R Users Group (KRUG) is hosting a brown bag viewing of RStudio’s webinar “Interactive Reporting” at 11am, Weds 3-Sept-2014 in 427 Hesler on the UTK campus “Hill” .  Per RStudio.net, data scientist Garrett Grolemund and software engineer Joe … Continue reading →

## World Bank fails to lead the way in #dataviz

August 12, 2014
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Matthew Yglesias, writing for Vox, cited the following chart from a World Bank project: His comment was: "We can see that while China has overtaken Germany and Japan to become the world's second-largest economy (i.e., total area of the rectangle)...

## Understanding the hot hand, and the myth of the hot hand, and the myth of the myth of the hot hand, and the myth of the myth of the myth of the hot hand, all at the same time

August 12, 2014
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Josh Miller writes: I came across your paper in the Journal of Management on unreplicable research, and in it you illustrate a point about the null hypothesis via the hot hand literature. I am writing you because I’d like to move your current prior (even if our work uses a classical approach). I am also […] The post Understanding the hot hand, and the myth of the hot hand, and…

## What not to say in a job interview

August 12, 2014
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I’ve interviewed a few people for jobs at Monash University, and there’s always someone who comes out with something surprising. Here are some real examples. For a post-doctoral research position: Q: What would you say were your major weaknesses? A: I don’t have any. Q: Really? You can’t think of anything that you could work […]

## GrapheR: A GUI for base graphics in R

August 12, 2014
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How did I miss the GrapheR package? The author, Maxime Hervé, published an article about the package [1] in the same issue of the R Journal as we did on googleVis. Yet, it took me a package update notification on CRANbeeries to look into GrapheR in mo...

## Egon Pearson’s Heresy

August 11, 2014
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Today is Egon Pearson’s birthday: 11 August 1895-12 June, 1980. E. Pearson rejected some of the familiar tenets that have come to be associated with Neyman and Pearson (N-P) statistical tests, notably the idea that the essential justification for tests resides in a long-run control of rates of erroneous interpretations–what he termed the “behavioral” rationale of tests. In an […]

## Two weights and two measures?

August 11, 2014
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This is an interesting story about the Meningitis B vaccine (some additional background here and here). In a nutshell, the main issue is that vaccines are subject to a slightly different regulation than other "normal" drugs. For example, patents do not...