This Wall Street Journal graphic shows who's selling (or sold) a percentage of their Facebook stocks and who's holding steady. This graphic is the perfect example of why I'm a proponent of the pie chart.
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When my friends hear me say that I’m buying a lottery ticket for a big draw I often get ...
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Adrien Friggeri has a lovely visualization of US Senators movement between clusters: You have to click the image and play with it to appreciate it. The methodology isn’t yet published – but I can see how this could be very illuminating.
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Mathematicians love mathematics. They love the elegance and the purity and the abstract nature of it all. Consequently they think there is something not quite nice about the practical real life mes...
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The fourth school bus accident in the Richmond, Virginia area occurred this morning. Everyone wants to know, what does this mean?!? Here’s what I think it means: bus accidents can be modeled ...
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When you have univariate data, that is, a single measure on a variety of units, the most common statistical graphic is a pie chart. But pie charts should not...
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I love a good infographic! After all, knowledge is power and the visualization of data makes absorbing information all the easier. Well-designed infographics have a way of pulling me into a subject...
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Utilizing data analysis capabilities in Wolfram|Alpha Pro, Stephen Wolfram looks at his quantified self based on his large collection of lifelogging data.
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Applying data-driven insights to achieve superior performance has become widespread in sports.
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How do you know when a new finding is significant? The sigma value can tell you — but watch out for dead fish.
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A further 200+ individuals are mentioned. The entries are arranged chronologically, so the document can be read as a story. Photo: R. A. Fisher (1890-1962). Statistician and geneticist
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If you can answer this question, you are on your way to making $180,000 a year: build a sequence of nearest neighbor classifiers around its tuning parameter K, choosing K using prediction accuracy estimated through tenfold cross validation.
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There are a lot of ways to show distributions, but for the purposes of this tutorial, I'm only going to cover the more traditional plot types like histograms and box plots. Otherwise, we could be here all night.
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An article that was published on this site in July 2011, "School attendance by grade and age in Liberia", shows that overage school attendance is very common in Liberia, mainly due to late entry into the education system.
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Despite having the unfortunate distinction of being the first and only industrialized nation to amass over $1 trillion in outstanding student loan debt, the United States no longer leads the world in college graduates.
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I continue to be the go-to guy for bad graphs. Today (i.e., 22 Feb), I received an email from Gary Rosin: I [Rosin] thought you might be interested in this graph showing the decline in median prices of homes since 1997.
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You probably already knew that you can draw mathematical equations in Google by typing the equation into the search box.
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Big Data analysis, not simply big data is driving the business data world. Dr. Gordon Springer of the University of Missouri is interviewed by Eric Lundquist...
Via Juan José Gibaja
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Online tutorials for statistics with R University of California at Davis, Getting Started with the R Data Analysis Package by Professor Norm Matloff Clarkson University, R Tutorial by Kelly Black...
Via Juan José Gibaja
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Here’s some research from Microsoft and Carnegie Mellon University that again shows the level of trust we place on the opinions of social media contacts – people we may in many cases have never met in real life.
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In statistics, we sometimes measure "nearness" or "farness" in terms of the scale of the data. Often "scale" means "standard deviation." For univariate data, we say that an observation that is one standard deviation from the mean is closer to the mean than an observation that is three standard deviations away. You can generalize these ideas to the multivariate normal distribution.
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For those who can make sense of the explosion of data, there are job opportunities in fields as diverse as crime, retail and dating.
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This post shows a technique to display proportions in Excel using a scatterplot instead of a pie chart.
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This series of five interactive graphics highlights the increases in bicycle commuting and safety correlated to increases in government spending. The take-home message is that increased government spending on bicycle infrastructure leads to more people commuting by bicycle and safer conditions for all bicyclists. From 2004 to 2009, the total number of bicycle commuters nearly doubled while total federal spending on bicycle infrastructure nearly tripled.
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