Where did it come from? Adding the source of each observation to a SAS data set

August 3, 2015
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Where did it come from? Adding the source of each observation to a SAS data set

Imagine the following scenario. You have many data sets from various sources, such as individual stores or hospitals. You use the SAS DATA step to concatenate the many data sets into a single large data set. You give the big data set to a colleague who will analyze it. Later […] The post Where did it come from? Adding the source of each observation to a SAS data set appeared…

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More than just Numbers

August 3, 2015
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More than just Numbers

The historical research uses statistics since ever.  And Official Statistics are a favourite source for quantitative historiography and digital humanities. …Continue reading →

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Producing a Control Chart in R – An Application in Analytical Chemistry

Producing a Control Chart in R – An Application in Analytical Chemistry

Introduction Many processes in chemistry, especially in synthesis, require attaining a certain target value for a property of interest.  For example, when synthesizing drug capsules that contain a medicine, a chemist has to ensure that the concentration of the medicine meets a target value.  If the concentration is too high or too low, then the patient […]

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Spam!

August 2, 2015
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The following bit of irrelevance appeared on the stan-users mailing list: On Jun 11, 2015, at 11:29 AM, Joanna Caldwell wrote: Webinar: Tips & Tricks to Improve Your Logistic Regression . . . Registration Link: . . . Abstract: Logistic regression is a commonly used tool to analyze binary classification problems. However, logistic regression still […] The post Spam! appeared…

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Statistical/methodological prep for a career in neuroscience research?

August 2, 2015
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Shea Levy writes: I’m currently a software developer, but I’m trying to transition to the neuroscience research world. Do you have any general advice or recommended resources to prepare me to perform sound and useful experimental design and analyses? I have a very basic stats background from undergrad plus eclectic bits and pieces I’ve picked […] The post Statistical/methodological prep…

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On the Great Financial Panic of 2007

August 1, 2015
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(a) I've always felt that "Great Financial Panic of 2007" was a good old-fashioned banking panic, even if the modern version at first looks quite different from those of the nineteenth and early twentieth centuries. Gary Gorton's wonderful book, buildi...

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If you leave your datasets sitting out on the counter, they get moldy

August 1, 2015
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I received the following in the email: I had a look at the dataset on speed dating you put online, and I found some big inconsistencies. Since a lot of people are using it, I hope this can help to fix them (or hopefully I did a mistake in interpreting the dataset). Here are the […] The post If you…

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This sentence by Thomas Mallon would make Barry N. Malzberg spin in his grave, except that he’s still alive so it would just make him spin in his retirement

July 31, 2015
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This sentence by Thomas Mallon would make Barry N. Malzberg spin in his grave, except that he’s still alive so it would just make him spin in his retirement

Don’t get me wrong, I think Thomas Mallon is great. But what was he thinking when he wrote this: I know the New Yorker doesn’t do fact-checking anymore, but still. The funny thing is, Malzberg has similarities with Mailer both in style and subject matter. I’m guessing that in his statement Mallon is trying to […] The post This sentence…

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Large matrices in SAS/IML 14.1

July 31, 2015
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Large matrices in SAS/IML 14.1

Last week, SAS released the 14.1 version of its analytics products, which are shipped as part of the third maintenance release of 9.4. If you run SAS/IML programs from a 64-bit Windows PC, you might be interested to know that you can now create matrices with about 231 ≈ 2 […] The post Large matrices in SAS/IML 14.1 appeared first…

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Milan EXPO: further thoughts

July 30, 2015
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Milan EXPO: further thoughts

I promised to blog more about the Milan EXPO so this is it. My first reactions were recorded here. (link) This post is primarily intended for those who are planning a visit. Orientation One of the smartest design decisions is...

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Autonomous killing machines won’t look like the Terminator…and that is why they are so scary

July 30, 2015
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Autonomous killing machines won’t look like the Terminator…and that is why they are so scary

Just a few days ago many of the most incredible minds in science and technology urged governments to avoid using artificial intelligence to create autonomous killing machines. One thing that always happens when such a warning is put into place is you see the inevitable Terminator picture:     The reality is that robots that

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“Women Respond to Nobel Laureate’s ‘Trouble With Girls’”

July 30, 2015
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Someone pointed me to this amusing/horrifying story of a clueless oldster. Some people are horrified by what the old guy said, other people are horrified by how he was treated. He was clueless in his views about women in science, or he was cluelessly naive about gotcha journalism. I haven’t been following the details and […] The post “Women Respond…

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But I Don’t Want to Be a Statistician!

July 29, 2015
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But I Don’t Want to Be a Statistician!

"For a long time I have thought I was a statistician.... But as I have watched mathematical statistics evolve, I have had cause to wonder and to doubt.... All in all, I have come to feel that my central interest is in data analysis...."Opening paragrap...

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Telling What’s True About Power, if practicing within the error-statistical tribe

July 29, 2015
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Telling What’s True About Power, if practicing within the error-statistical tribe

Suppose you are reading about a statistically significant result x (at level α) from a one-sided test T+ of the mean of a Normal distribution with n iid samples, and (for simplicity) known σ:   H0: µ ≤  0 against H1: µ >  0.  I have heard some people say [0]: A. If the test’s power to detect alternative µ’ is very low, then […]

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What’s the stupidest thing the NYC Department of Education and Columbia University Teachers College did in the past decade?

July 29, 2015
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Ummm, how bout this: The principal of a popular elementary school in Harlem acknowledged that she forged answers on students’ state English exams in April because the students had not finished the tests . . . As a result of the cheating, the city invalidated several dozen English test results for the school’s third grade. […] The post What’s the…

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Odds ratio plots with a logarithmic scale in SAS

July 29, 2015
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Odds ratio plots with a logarithmic scale in SAS

I recently read an argument by Andrew Wheeler for using a logarithmic axis for plotting odds ratios. I found his argument convincing. Accordingly, this blog post shows how to create an odds ratio plot in SAS where the ratio axis is displayed on a log scale. Thanks to Bob Derr […] The post Odds ratio plots with a logarithmic scale…

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Introducing: The Open Science Committee at our department

July 28, 2015
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Large-scale replication projects of the last years (e.g., ManyLabs I, II, and III, Reproducibility Project: Psychology) showed that the “replication crisis” in psychology is more than just hot air: According to recent estimates, ~60% of cur...

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I loved this %>% crosstable

July 28, 2015
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I loved this %>% crosstable

This is a public tank you for @heatherturner's contribution. Now the SciencesPo's crosstable can work in a chain (%>%) fashion; useful for using along with other packages that have integrated the magrittr operator. > candidatos %>% + filter(desc_cargo == 'DEPUTADO ESTADUAL'| desc_cargo =='DEPUTADO DISTRITAL' | desc_cargo =='DEPUTADO FEDERAL' | desc_cargo =='VEREADOR' | desc_cargo =='SENADOR') %>% […]

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Slowing things down

July 28, 2015
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Slowing things down

Who doesn't love a good top 10 list? They're short, easy to read, and for the sake of us not having to think too hard, have already decided the answer for us. A favorite top 10 genre of mine is the top 10 cities list. We've all seen them...

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Pluto: To Catch an Icy King

July 28, 2015
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Pluto: To Catch an Icy King

Sly as a fox, it is. Mysterious and diminutive, it has eluded us for decades. Despite what we've learned about Pluto, constant debate continues to rage over its classification. From the moment it was discovered, astronomers have bickered over this icy ...

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Goals for the New R Consortium

July 28, 2015
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Goals for the New R Consortium

by Bob Muenchen The recently-created R Consortium consists of companies that are deeply involved in R such as RStudio, Microsoft/Revolution Analytics, Tibco, and others. The Consortium’s goals include advancing R’s worldwide promotion and support, encouraging user adoption, and improving documentation … Continue reading →

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Announcing the JHU Data Science Hackathon 2015

July 28, 2015
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We are pleased to announce that the Department of Biostatistics at the Johns Hopkins Bloomberg School of Public Health will be hosting the first ever JHU Data Science Hackathon (DaSH) on September 21-23, 2015 at the Baltimore Marriott Waterfront. This event will be an opportunity for data scientists and data scientists-in-training to get together and

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“We can keep debating this after 11 years, but I’m sure we all have much more pressing things to do (grants? papers? family time? attacking 11-year-old papers by former classmates? guitar practice?)”

July 28, 2015
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Someone pointed me to this discussion by Lior Pachter of a controversial claim in biology. The statistics The statistical content has to do with a biology paper by M. Kellis, B. W. Birren, and E.S. Lander from 2004 that contains the following passage: Strikingly, 95% of cases of accelerated evolution involve only one member of […] The post “We can…

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