Light entertainment: when up is down (double bill)

November 7, 2013
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Light entertainment: when up is down (double bill)

Abhinav takes us to this chart: Only in politics. *** A co-worker reminds me of this gem by Fox News a few years back:

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Tapestry 2014 Announced

November 7, 2013
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Tapestry 2014 Announced

After a very successful Tapestry conference in February this year, we have been getting a steady stream of questions from people about another event next year. Now we're finally able to announce next year's event. And it will be awesome, again.

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“Marginally significant”

November 6, 2013
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“Marginally significant”

Jeremy Fox writes: You’ve probably seen this [by Matthew Hankins]. . . . Everyone else on Twitter already has. It’s a graph of the frequency with which the phrase “marginally significant” occurs in association with different P values. Apparently it’s real data, from a Google Scholar search, though I haven’t tried to replicate the search […]The post “Marginally significant” appeared first on Statistical Modeling, Causal Inference, and Social Science.

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Correspondence Analysis in R

November 6, 2013
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Correspondence Analysis in R

Correspondence analysis (from a layman’s perspective) is like principal components analysis for categorical data. It can be useful to discover structure in this type of data. My friend Gianmarco Alberti, an archaeologist, has put together an in depth web site … Continue reading →

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A Mitochondrial Manhattan Plot

November 6, 2013
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A Mitochondrial Manhattan Plot

Manhattan plots have become the standard way to visualize results for genetic association studies, allowing the viewer to instantly see significant results in the rough context of their genomic position.  Manhattan plots are typically shown on a l...

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If we observed p_hat = .46, why do we use p=.5?

November 6, 2013
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I aim to commit statistical sin. I’m going to accept the null hypothesis for no other reason than because I “failing to reject it”. Having tarnished my reputation with that, I’ll finish by ignoring the only data available and ba...

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How to specify mosaic plot colors in SAS

November 6, 2013
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How to specify mosaic plot colors in SAS

The mosaic plot is a graphical visualization of a frequency table. In a previous post, I showed how to use the FREQ procedure to create a mosaic plot. This article shows how to create a mosaic plot by using the MOSAICPARM statement in the graph template language (GTL). (The MOSAICPARM [...]

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R: Mapping Philippine Earthquakes (October 2013)

November 6, 2013
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R: Mapping Philippine Earthquakes (October 2013)

Last month, October 15, 2013 around 8:12 am (Philippine Time), a magnitude 7.2 earthquake hit Bohol island, detroying several infrastructures and killing hundreds of residents. The Philippine Institute of Volcanology and Seismology or PhiVolcs recorde...

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Bayesian Biostatistics 2014

November 5, 2013
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This has to do with the ISBA Biostats section (I suppose it will be even more, if I am elected to the post of Program Chair, but I'll try and be involved even if I don't win!): the next Bayesian Biostatistics Conference has just been announced and will...

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WSJ tells stories about working women

November 5, 2013
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WSJ tells stories about working women

Over twitter, Jeff Harrison @mrjeffharrison shouted "Story time!" at this Wall Street Journal report on a Citibank/LinkedIn survey of working men and women. "Story time" is the trick of reporting some statistics, then spinning a story that has little or nothing to do with the data just presented. This tactic is effective as some readers erroneously assume that the story is supported by the data. A good illustration is this…

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Pricing reinsurance contracts, another case study

November 5, 2013
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Pricing reinsurance contracts, another case study

A reinsurance case study for tomorrow’s class. The goal will be to price some nonproportional reinsurance contract, for business interruption claims. Consider the following dataset, > library(gdata) > db=read.xls( + "http://perso.univ-rennes1.fr/arthur.charpentier/SIN_1985_2000-PE.xls", + sheet=1) Content type 'application/vnd.ms-excel' length 183808 bytes (179 Kb) open URL ================================================== downloaded 179 Kb As for any (standard) insurance contract, there are two parts in the pricing the expected number of claims the average cost of individual…

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How to Host a Conference on Google Hangouts on Air

November 5, 2013
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We recently hosted the first ever Simply Statistics Unconference on the Future of Statistics. In preparing for the event, we learned a lot about how to organize such an event and frankly we wished there had been a bit more … Continue reading →

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How much do we trust a new claim that early childhood stimulation raised earnings by 42%?

November 5, 2013
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Hal Pashler wrote in about a recent paper, “Labor Market Returns to Early Childhood Stimulation: a 20-year Followup to an Experimental Intervention in Jamaica,” by Paul Gertler, James Heckman, Rodrigo Pinto, Arianna Zanolini, Christel Vermeerch, Susan Walker, Susan M. Chang, and Sally Grantham-McGregor. Here’s Pashler: Dan Willingham tweeted: @DTWillingham: RCT from Jamaica: Big effects 20 […]The post How much do we trust a new claim that early childhood stimulation raised…

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What’s in a cronut? Let me find out

November 5, 2013
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What’s in a cronut? Let me find out

Reader Ross S. did not join the line for this cronut, illustrating the popularity of different makers of tracking software on 1.3 million websites. Original by Analytics SEO is here. *** The biggest beef I have with this cronut is...

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Typos in BMHE

November 5, 2013
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Typos in BMHE

No matter how many times you check and no matter how good the publishers are, I'm guessing there's no way out of getting typos in a publication, especially if it's a relatively long one, such as a book.I've just discovered a couple in BMHE, which I tho...

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Display googleVis charts within RStudio

November 5, 2013
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Display googleVis charts within RStudio

The preview version 0.98.441 of RStudio introduced a new viewer pane to render local web content and with that it allows me to display googleVis charts within RStudio rather than in a separate browser window. I think this is a rather nice feature and...

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Finding Reversal Zone in Intraday FX prices

November 5, 2013
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Finding Reversal Zone in Intraday FX prices

There is no holy grail in trading instead there are strategies that work for a while or in a specific market environment. The role of the analyst is therefore twofold.  First find a good trading strategy, second find the right environment for this strategy. The present post focuses on the latter. More specifically it aims […]

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qstats – quick and dirty statistics tool for the Unix pipeline

November 5, 2013
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qstats – quick and dirty statistics tool for the Unix pipeline

Back when 200MB hard drives were the size of washing machines and programs had no choice but to be as efficient as possible, Unix was born. In a serendipitous twist of fate, the same programs that were borne of this era of 4MB RAM and 16 bit processors are useful to data analysts with 2,000 »more

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Optional stopping in data collection: p values, Bayes factors, credible intervals, precision

November 5, 2013
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Optional stopping in data collection: p values, Bayes factors, credible intervals, precision

This post argues that data collection should stop when a desired degree of precision is achieved (as measured by a Bayesian credible interval), not when a critical p value is achieved, not when a critical Bayes factor is achieved, and not even when a B...

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Commissions

November 5, 2013
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Commissions

Today, I want to explain the commission’s functionality build in to Systematic Investor Toolbox(SIT) “share” back-test. At each re-balance time the capital is allocated given the weight such that For example, if weight is 100% (i.e. fully invested) and capital = $100 and price = $10 then The period return is equal to The total […]

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Shlemiel the Software Developer and Unknown Unknowns

November 4, 2013
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Shlemiel the Software Developer and Unknown Unknowns

The Stan meeting today reminded me of Joel Spolsky’s recasting of the Yiddish joke about Shlemiel the Painter. Joel retold it on his blog, Joel on Software, in the post Back to Basics: Shlemiel gets a job as a street painter, painting the dotted lines down the middle of the road. On the first day […]The post Shlemiel the Software Developer and Unknown Unknowns appeared first on Statistical Modeling, Causal…

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Smoothing mortality rates

November 4, 2013
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Smoothing mortality rates

This morning, I was working with Julie, a student of mine, coming from Rennes, on mortality tables. Actually, we work on genealogical datasets from a small region in Québec, and we can observe a lot of volatiliy. If I borrow one of her graph, we get something like Since we have some missing data, we wanted to use some Generalized Nonlinear Models. So let us see how to get a…

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My talk @ the Dutch Chemometrics Symposium

November 4, 2013
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My talk @ the Dutch Chemometrics Symposium

For same reason, Paul Eilers really liked the talk I gave on INLA at the BayesPharma workshop earlier this year and so he invited me to talk at the Dutch Chemometrics Symposium.Now: you may ask what have I got to do with chemometrics. An...

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