What is the “Average” American Salary?

September 11, 2013
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What is the “Average” American Salary?

In America, the richest 1% of households earned almost 20% of the income in 2012, which points to a very wide income gap. This presents many social and economic problems, but also a statistical problem: what is the “average” American’s salary? This average is often reported as GDP per capita: the mean of household incomes. […]

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Create phase portraits in SAS

September 11, 2013
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Create phase portraits in SAS

In a previous post, I showed how to solve differential equations in SAS by using the ODE subroutine in the SAS/IML language, which solves initial value problems. This article describes how to draw phase portraits for two classic differential equations: the equations of motion for the simple harmonic oscillator and [...]

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(Part 2) Peircean Induction and the Error-Correcting Thesis

September 11, 2013
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(Part 2) Peircean Induction and the Error-Correcting Thesis

Continuation of “Peircean Induction and the Error-Correcting Thesis” Deborah G. Mayo Transactions of the Charles S. Peirce Society: A Quarterly Journal in American Philosophy, Volume 41, Number 2, 2005, pp. 299-319 Part 1 is here. There are two other points of confusion in critical discussions of the SCT, that we may note here: I. The […]

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MAXIMA research centre at Monash Uni

September 11, 2013
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MAXIMA research centre at Monash Uni

The “Monash Academy for Cross and Interdisciplinary Mathematical Applications” (MAXIMA) is a new research centre that aims to maximise the potential of mathematics to deliver impact to society. It will be led by Kate Smith-Miles. I will also be inv...

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Online course on forecasting using R

September 11, 2013
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Online course on forecasting using R

I am teaming up with Revolution Analytics to teach an online course on forecasting with R. Topics to be covered include seasonality and trends, exponential smoothing, ARIMA modelling, dynamic regression and state space models, as well as forecast accuracy methods and forecast evaluation techniques such as cross-validation. I will talk about some of my consulting experiences, and explain the tools in the forecast package for R. The course will run…

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The odds of choking from atmospheric fluctuations

September 10, 2013
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This is the first of a two part series about Bayes Theorem and the Second Law of Thermodynamics. It begins with the question: What are the odds that one hour from now, the diffuse air in the sealed and insulated room I’m in will position itself in th...

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Cool visualization of Metropolis sampling

September 10, 2013
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Cool visualization of Metropolis sampling

A cool visualization of Metropolis sampling has been posted by Maxwell Joseph here. I've pasted in his animated gif below, as a teaser for you to check his post (and I figured it would be okay because his work focuses on "parasitic biodiversity" ;-). T...

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Essential Collection of Visualisation Resources

September 10, 2013
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Essential Collection of Visualisation Resources

From: http://www.visualisingdata.com/index.php/resources/Here is a collection of some of the most important, effective, useful and practical data visualisation tools. The content covers the many different resources used to create and publish visualisat...

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The ethics of lying, cheating, and stealing with data: A case study

September 10, 2013
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I’ve been following with mild interest the recent news stories on the lawbreaking at the Steven A. Cohen hedge fund, for the silly reason that I gave a paid lecture for them a few years ago. I wasn’t thinking too hard about whether they would be using my wonderful statistical ideas to be more effective […]The post The ethics of lying, cheating, and stealing with data: A case study appeared…

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Biostatistics seminar

September 10, 2013
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As part of the activities of the UCL Biostatistics Network, we organise regular seminars, to which we invite (usually relatively local $-$ for budget reasons only!) speakers. September is the start of the new term, and we'll kick off with what (in...

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A Monty Simulation

September 10, 2013
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A Monty Simulation

I was listening to Science Friday from Sep 6th. and one of the discussions by Ira Flatow was on the well known Monty Hall Problem.  This problem has been hashed out many times and in fact I was first introduced to the probability aspects of the problem while taking my introductory to statistics class when […]

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ave and the "[" function in R

September 10, 2013
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ave and the "[" function in R

The ave function in R is one of those little helper function I feel I should be using more. Investigating its source code showed me another twist about R and the "[" function. But first let's look at ave.The top of ave's help page reads:Group Averages ...

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Peircean Induction and the Error-Correcting Thesis (Part I)

September 10, 2013
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Peircean Induction and the Error-Correcting Thesis (Part I)

Today is C.S. Peirce’s birthday. I hadn’t blogged him before, but he’s one of my all time heroes. You should read him: he’s a treasure chest on essentially any topic. I’ll blog the main sections of a (2005) paper over the next few days. It’s written for a very general philosophical audience; the statistical parts […]

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Sports journalists reported lies and then lie some more, just like dopers

September 9, 2013
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Note: This is part 2 of a three-part response to an important article that appeared in the New York Times in August. See Part 1 here. *** Part 2 deals with a few disagreements I have with Tim Rohan, who is the author of the article. The first sentence of Rohan's article took my breath away: Doping experts have long known that drug tests catch only a tiny fraction of…

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The Eve of the NYC Democratic Mayoral Primary Election

September 9, 2013
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The Eve of the NYC Democratic Mayoral Primary Election

It is the eve of the New York City Democratic mayoral primary election.  This is a simple follow-up on my post from last Friday as I was curious how the final pre-Election Day polling was going to fall.  It’s fairly clear who is going to get the most votes.  Though we have a very good […]

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False memories and statistical analysis

September 9, 2013
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Alison George interviews Elizabeth Loftus. It’s good stuff, important stuff, and it relates to my view as a statistician that uncertainty and variation are important. Uncertainty is relevant here because there are things that people remember that never happened. Variation is important because different people remember different things. Loftus’s work also seems relevant to the […]The post False memories and statistical analysis appeared first on Statistical Modeling, Causal Inference, and…

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Light entertainment: the Wired touted pie

September 9, 2013
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Light entertainment: the Wired touted pie

Via Data Viz News, and sourced to Wired Perhaps the yellow piece gives us a clue: it represents 1 percent, which is the perceived importance of "sophisticated visual aids" in a TED talk.

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Solving differential equations in SAS

September 9, 2013
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Solving differential equations in SAS

Differential equations arise in the modeling of many physical processes, including mechanical and chemical systems. You can solve systems of first-order ordinary differential equations (ODEs) by using the ODE subroutine in the SAS/IML language, which solves initial value problems. This article uses the equations of motion for the classic simple [...]

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Watch the TCC Keynote Live on Monday

September 9, 2013
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Watch the TCC Keynote Live on Monday

The Tableau Customer Conference (TCC) starts tomorrow with a big keynote that includes demos of upcoming features. Watch it live at this link, and see me demo something new and exciting. Now don’t think that this is purely a marketing keynote. The people there are almost all customers already, so they don’t need to be […]

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LaTeX: Introduction – First Document

September 9, 2013
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LaTeX: Introduction – First Document

Let us start with a simple $\mathrm{\LaTeX}$ document. Open your text editor (Texmaker, TeXnicCenter, TeXworks, etc.), then go to File>New, and paste the following:Save this and make sure the file has .tex extension. You should have something like t...

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How to study statistics (Part 1)

September 9, 2013
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How to study statistics (Part 1)

To students of statistics Most of my posts are directed at teachers and how to teach statistics. The blog this week and next is devoted to students. I present principles that will help you to learn statistics. I’m turning them … Continue reading →

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Program chair

September 8, 2013
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Program chair

The other day, Julien asked me if I wanted to run for program chair of the ISBA Section on Biostatistics and Pharmaceutical Statistics, of which I am a member.I thought about it for a bit and then I decided to go for it. I'm up against the incumbe...

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Jobs @ UCL

September 8, 2013
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Irene (who, among other things, is one of the co-apps in the RDD project $-$ in fact, she'll be a fundamental part of the research!) sent me a couple of job adverts for research assistant positions that will shortly be available at UCL. She and the job...

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