Category: Miscellaneous Statistics

What to think about this new study which says that you should limit your alcohol to 5 drinks a week?

Someone who wishes to remain anonymous points us to a recent article in the Lancet, “Risk thresholds for alcohol consumption: combined analysis of individual-participant data for 599 912 current drinkers in 83 prospective studies,” by Angela Wood et al., that’s received a lot of press coverage; for example: Terrifying New Study Breaks Down Exactly How Drinking […]

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He’s a history teacher and he has a statistics question

Someone named Ian writes: I am a History teacher who has become interested in statistics! The main reason for this is that I’m reading research papers about teaching practices to find out what actually “works.” I’ve taught myself the basics of null hypothesis significance testing, though I confess I am no expert (Maths was never […]

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Ethics in statistical practice and communication: Five recommendations.

I recently published an article summarizing some of my ideas on ethics in statistics, going over these recommendations: 1. Open data and open methods, 2. Be clear about the information that goes into statistical procedures, 3. Create a culture of respect for data, 4. Publication of criticisms, 5. Respect the limitations of statistics. The full […]

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Toward better measurement in K-12 education research

Billy Buchanan, Director of Data, Research, and Accountability, Fayette County Public Schools, Lexington, Kentucky, expresses frustration with the disconnect between the large and important goals of education research, on one hand, and the gaps in measurement and statistical training, on the other. Buchanan writes: I don’t think that every classroom educator, instructional coach, principal, or […]

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“Ivy League Football Saw Large Reduction in Concussions After New Kickoff Rules”

I noticed this article in the newspaper today: A simple rule change in Ivy League football games has led to a significant drop in concussions, a study released this week found. After the Ivy League changed its kickoff rules in 2016, adjusting the kickoff and touchback lines by just five yards, the rate of concussions […]

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My talk tomorrow (Tues) 4pm in the Biomedical Informatics department (at 168th St)

The talk is 4-5pm in Room 200 on the 20th floor of the Presbyterian Hospital Building, Columbia University Medical Center. I’m not sure what I’m gonna talk about. It’ll depend on what people are interested in discussing. Here are some possible topics: – The failure of null hypothesis significance testing when studying incremental changes, and […]

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(People are missing the point on Wansink, so) what’s the lesson we should be drawing from this story?

People pointed me to various recent news articles on the retirement from the Cornell University business school of eating-behavior researcher and retraction king Brian Wansink. I particularly liked this article by David Randall—not because he quoted me, but because he crisply laid out the key issues: The irreproducibility crisis cost Brian Wansink his job. Over […]

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Job opening at CDC: “The Statistician will play a central role in guiding the statistical methods of all major projects of the Epidemiology and Prevention Branch of the CDC Influenza Division, and aid in designing, analyzing, and interpreting research intended to understand the burden of influenza in the US and internationally and identify the best influenza vaccines and vaccine strategies.”

This sounds super interesting: Vacancy Information: Mathematical Statistician, GS-1529-14 Please apply at one of the following: · DE (External candidates to the US GOV) Announcement: HHS-CDC-D3-18-10312897 · MP (Internal candidates to the US GOV) Announcement: HHS-CDC-M3-18-10312898 Location: Atlanta, GA – Centers for Disease Control and Prevention – National Center for Immunization and Respiratory Disease – […]

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Don’t calculate post-hoc power using observed estimate of effect size

Aleksi Reito writes: The statement below was included in a recent issue of Annals of Surgery: But, as 80% power is difficult to achieve in surgical studies, we argue that the CONSORT and STROBE guidelines should be modified to include the disclosure of power—even if less than 80%—with the given sample size and effect size […]

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“Tweeking”: The big problem is not where you think it is.

In her recent article about pizzagate, Stephanie Lee included this hilarious email from Brian Wansink, the self-styled “world-renowned eating behavior expert for over 25 years”: OK, what grabs your attention is that last bit about “tweeking” the data to manipulate the p-value, where Wansink is proposing research misconduct (from NIH: “Falsification: Manipulating research materials, equipment, […]

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