Thomas

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Statisticians and clients in research

Emir B, Amaratunga D, Beltangady M, Cabrera J, Freeman R, Madigan D, Nguyen H, Whalen E

What are the key assumptions of linear regression? - Statistical Modeling, Causal Inference, and Social Science

Andy Cooper writes:<p>A link to an article, “Four Assumptions Of Multiple Regression That Researchers Should Always Test”, has been making the rounds on …

40 Maps That Will Help You Make Sense of the World

If you’re a visual learner like myself, then you know maps, charts and infographics can really help bring data and information to life. Maps can make …

Sample size calculations: should the emperor’s clothes be off the peg or made to measure?

• Geoffrey Norman, statistician and cognitive psychologist1,<br>• Sandra Monteiro, graduate student2,<br>• Suzette Salama, chair of McMaster research ethics board 3<p>…

Clinical Trials

Statistics Notes: Missing outcomes in randomised trials

• Andrew J Vickers, attending research methodologist1,<br>• Douglas G Altman, professor of statistics in medicine2<p>1Department of Epidemiology and …

Clinical trials: enrollment targets vs. valid hypothesis testing

The questions raised in this <i>Scientific American article</i> ought to concern all of us, and I want to take some of these questions further. But let me …

Clinicians are right not to like Cohen’s κ

• Henrica C W de Vet, professor of clinimetrics1,<br>• Lidwine B Mokkink, junior researcher of clinimetrics1,<br>• Caroline B Terwee, assistent professor of …

Data cleaning is harder than statistical analysis

Statistical analysis is relatively hard, but it is a piece of cake compared to data collection, cleaning, and manipulation. In fact, in clinical …