Plaig! (non-Wegman edition)

August 22, 2015
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Mark Vallen writes (link from here): What initially disturbed me about the art of Shepard Fairey is that it displays none of the line, modeling and other idiosyncrasies that reveal an artist’s unique personal style. His imagery appears as though it’s xeroxed or run through some computer graphics program; that is to say, it is […] The post Plaig! (non-Wegman edition) appeared first on Statistical Modeling, Causal Inference, and Social…

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Data frames and tables in Scala

August 21, 2015
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Data frames and tables in Scala

Introduction To statisticians and data scientists used to working in R, the concept of a data frame is one of the most natural and basic starting points for statistical computing and data analysis. It always surprises me that data frames aren’t a core concept in most programming languages’ standard libraries, since they are essentially a … Continue reading Data frames and tables in Scala

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Data frames and tables in Scala

August 21, 2015
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Data frames and tables in Scala

Introduction To statisticians and data scientists used to working in R, the concept of a data frame is one of the most natural and basic starting points for statistical computing and data analysis. It always surprises me that data frames aren’t a core concept in most programming languages’ standard libraries, since they are essentially a … Continue reading Data frames and tables in Scala

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That was easy

August 21, 2015
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This came in the email from Tom Kertscher: Are you available this afternoon or Wednesday to talk about a fact-check article I’m doing on Gov. Scott Walker’s statement that Wisconsin is a “blue” state? I’m aware, of course, that Wisconsin has voted for the Democratic presidential nominee in each election since 1988. But I’d like […] The post That was easy appeared first on Statistical Modeling, Causal Inference, and Social…

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Interview with Sherri Rose and Laura Hatfield

August 21, 2015
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Interview with Sherri Rose and Laura Hatfield

  Rose/Hatfield © Savannah Bergquist Laura Hatfield and Sherri Rose are Assistant Professors specializing in biostatistics at Harvard Medical School in the Department of Health Care Policy. Laura received her PhD in Biostatistics from the University of Minnesota and Sherri completed her PhD in Biostatistics at UC Berkeley. They are developing novel statistical methods for

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Assistant Professor of Statistics at IUPUI

August 21, 2015
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Assistant Professor of Statistics at IUPUI

I graduated from MSU this summer and moved to Indianapolis as an assistant professor of Statistics at IUPUI. This is my first official job in life. Welcome to my Homepage: math.iupui.edu/~hlwang !

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Assistant Professor of Statistics at IUPUI

August 21, 2015
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Assistant Professor of Statistics at IUPUI

I graduated from MSU this summer and moved to Indianapolis as an assistant professor of Statistics at IUPUI. This is my first official job in life. Welcome to my Homepage: math.iupui.edu/~hlwang !

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Aahhhhh, young people!

August 21, 2015
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Amusingly statistically illiterate headline from Slate: “Apple Notices That Basically Half the Population Menstruates.” Ummmm, let’s do a quick calculation: 50 – 12 = 38. If you assume the average woman lives to be 80, then the proportion of the population who is menstruating is approximately .52*38/80 = .247. 25% is hardly “basically half”! But […] The post Aahhhhh, young people! appeared first on Statistical Modeling, Causal Inference, and Social…

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She wants to be an airborne ranger

August 21, 2015
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She wants to be an airborne ranger

I wanna be an airborne ranger, Live the life of guts and danger.* If you are an 80's movie buff, you might remember the scene in The Breakfast Club where Bender, the juvenile delinquent played by Judd Nelson, distracts the principal by running through the school singing this song. Recently, […] The post She wants to be an airborne ranger appeared first on The DO Loop.

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How to avoid making mountains out of molehills, using power/severity

August 21, 2015
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How to avoid making mountains out of molehills, using power/severity

A classic fallacy of rejection is taking a statistically significant result as evidence of a discrepancy from a test (or null) hypothesis larger than is warranted. Standard tests do have resources to combat this fallacy, but you won’t see them in textbook formulations. It’s not new statistical method, but new (and correct) interpretations of existing methods, that are needed. One […]

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If you ask different questions you get different answers – one more way science isn’t broken it is just really hard

August 20, 2015
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If you ask different questions you get different answers – one more way science isn’t broken it is just really hard

If you haven't already read the amazing piece by Christie Aschwanden on why Science isn't Broken you should do so immediately. It does an amazing job of capturing the nuance of statistics as applied to real data sets and how that can be misconstrued as science being "broken" without falling for the easy "everything is wrong"

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Econometric Society World Congress

August 20, 2015
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Econometric Society World Congress

The Econometric Society holds a World Congress every five years. Right now, the 2015 Congress is taking place in Montréal, Canada.Here's the full program. Enjoy!© 2015, David E. Giles

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Data-analysis assignments for BDA class?

August 20, 2015
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In my Bayesian data analysis class this fall, I’m planning on doing some lecturing and class discussion, but the core of the course will be weekly data-analysis assignments where they do applied statistics using Stan (to fit models) and R (to pre-process the data and post-process the inferences). So, I need a bunch of examples. […] The post Data-analysis assignments for BDA class? appeared first on Statistical Modeling, Causal Inference,…

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Dumbing by numbers

August 20, 2015
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The New York Times has been making waves this week featuring management practices at Amazon and workplace tracking practices at various companies (link). These are essential references for how data make us dumber. I am going to ignore the shocking claim by the journalist who stated that GE is "long a standard-setter in management practices." To give him some credit, he did not say "good" management practice. It is true…

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Job @ UCL

August 20, 2015
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Here is the link for a new post recently advertised at UCL. The job is in the Department of Epidemiology and Public Health, but I think the idea is to try and bridge some strong and durable connections with our group. I have done some joint w...

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Aren’t you on holiday?

August 20, 2015
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Aren’t you on holiday?

I've been very silent throughout the month of August $-$ no single post, so far. The main reason for that is that we've moved home (although not very far from where we were), which has meant lots of fun...Highlights of this recent period include: 1) a ...

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Kickin’ it with elastic net regression

August 20, 2015
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Kickin’ it with elastic net regression

With the kind of data that I usually work with, overfitting regression models can be a huge problem if I'm not careful. Ridge regression is a really effective technique for thwarting overfitting. It does this by penalizing the L2 norm… Continue reading →

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Statistics, the Spooky Science

August 19, 2015
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Statistics, the Spooky Science

I was reading this interview Of Erich Lehmann yesterday: “A Conversation with Erich L. Lehmann” Lehmann: …I read over and over again that hypothesis testing is dead as a door nail, that nobody does hypothesis testing. I talk to Julie and she says that in the behaviorial sciences, hypothesis testing is what they do the […]

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P > 0.05? I can make any p-value statistically significant with adaptive FDR procedures

August 19, 2015
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P > 0.05? I can make any p-value statistically significant with adaptive FDR procedures

Everyone knows now that you have to correct for multiple testing when you calculate many p-values otherwise this can happen:   One of the most popular ways to correct for multiple testing is to estimate or control the false discovery rate. The false discovery rate attempts to quantify the fraction of made discoveries that are

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“Soylent 1.5” < black beans and yoghurt

August 19, 2015
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“Soylent 1.5” < black beans and yoghurt

Mark Palko quotes Justin Fox: On Monday, software engineer Rob Rhinehart published an account of his new life without alternating electrical current — which he has undertaken because generating that current “produces 32 percent of all greenhouse gases, more than any other economic sector.” Connection to the power grid isn’t all Rhinehart has given up. […] The post “Soylent 1.5” < black beans and yoghurt appeared first on Statistical Modeling,…

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When in Seattle, don’t look for the bus map

August 19, 2015
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When in Seattle, don’t look for the bus map

The past week in Seattle, I was blessed with amazing weather. The city has great coffee and restaurants, so pleased me alright. But Seattle-ites, please tell your government to burn your transit map presto! I tried looking at the map...

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Bar Charts, Error Bars and R

August 19, 2015
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A recent post on R Bloggers, linked to an article on DataScience+ that details how to use R to plot error bars on bar charts to indicate the variability in a particular variable. There are many other articles that detail this type of chart, sometimes ...

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Correlations between groups of variables

August 19, 2015
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Correlations between groups of variables

Typically a correlation analysis reports the correlations between all pairs of variables, including the variables with themselves. The resulting correlation matrix is square, symmetric, and has 1s on the main diagonal. But suppose you are interested in only specific combinations of variables. Perhaps you want the pairwise correlations between one […] The post Correlations between groups of variables appeared first on The DO Loop.

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