Posts Tagged ‘ statistics ’

Top Grossing Movies by Year (U.S.)

December 28, 2011
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Top Grossing Movies by Year (U.S.)

Description:Top grossing movie year by year, adjusted for inflation.Data:http://thenumbers.comAnalysis:This is a bit of an odd chart.  It only shows the total gross of the highest grossing movie for each year.  When adjusted for inflation, 'G...

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Le Monde puzzle [#754]

December 25, 2011
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Le Monde puzzle [#754]

The pre-X’mas puzzle in Le Monde weekend edition is about “magical numbers” having as digits all digits between 0 and n (at least once) and being multiple of all digits between 1 and (n+1). Easy, isn’t it?! I thought so while driving down to the Alps on Saturday and (on Monday early morning) I tried

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ASU Tuition by Academic Year

December 22, 2011
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ASU Tuition by Academic Year

Description:Arizona State University tuition fees from 1987-2011.Data:https://azregents.asu.edu/ABOR%20Reports/TUITION%20HISTORY.pdfAnalysis:It has been suggested that the 'cost' of tuition has remained the same throughout the years, yet the 'price' of...

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semi-automatic ABC

December 17, 2011
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semi-automatic ABC

The talk of Wednesday afternoon Ordinary Meeting of the Royal Statistical Society went on quite well, I think. I would have expected a few people (in general) and some specific people (in particular) but this being the last week of term the schedule was not the best of times. Paul Fearnhead gave the talk, insisting

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A quick primer on split-apply-combine problems

December 16, 2011
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A quick primer on split-apply-combine problems

I’ve just answered my hundred billionth question on Stack Overflow that goes something like I want to calculate some statistic for lots of different groups. Although these questions provide a steady stream of easy points, its such a common and basic data analysis concept that I thought it would be useful to have a document

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Bayesian inference and the parametric bootstrap

December 15, 2011
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Bayesian inference and the parametric bootstrap

This paper by Brad Efron came to my knowledge when I was looking for references on Bayesian bootstrap to answer a Cross Validated question. After reading it more thoroughly, “Bayesian inference and the parametric bootstrap” puzzles me, which most certainly means I have missed the main point. Indeed, the paper relies on parametric bootstrap—a frequentist

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Le Monde puzzle [#752]

December 8, 2011
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Le Monde puzzle [#752]

After a loooong break, here is one Le Monde mathematical puzzle I had time to look at, prior to going to Dauphine for a Saturday morning class (in replacement of my R class this week)! The question is as follows: A set of numbers {1,…,N} is such that multiples of 4 are tagged C and

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My Favorite Graphs

December 5, 2011
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My Favorite Graphs

The important criterion for a graph is not simply how fast we can see a result; rather it is whether through the use of the graph we can see something that would have been harder to see otherwise or that could not have been seen at all. – William Cleveland, The Elements of Graphing Data, Related posts:

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quantum forest

December 1, 2011
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quantum forest

Thanks to a link on R-bloggers, I was introduced to Luis Apiolaza’s blog, Quantum Forest, which covers data analyses and R comments he encounters in his research as a quantitative forester/geneticist. And he works at the University of Canterbury, Christchurch, where I first taught from Bayesian Core in 2006. Which may be why he chose

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mean of an absolute Student’s t

November 30, 2011
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mean of an absolute Student’s t

Having (rather foolishly) involved myself into providing an answer for Cross Validated: “Can the standard deviation of non-negative data exceed the mean?“, I ended up having to derive the mean of the absolute value of a Student’s variate X.  (Well, not really, but then I did.) I think the following is correct: where is the

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