May 5: Statistics in Practice

In this week’s Brief, we look deeper into the question of whether Covid-19 is a senior citizen disease.  Our course spotlight is twofold: Start in May or June:  Mastery in Statistical Modeling (3 courses) June 12 to July 10  Analyzing and Modeling Covid-19 Data See…

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COVID-19: Sensitivity, Specificity, and More

Covid-19 has brought statistical concepts and terms into the news as never before. One confusing tangle is the array of terms surrounding diagnostic test results.  The most basic is accuracy - what percent of test results are correct.  This is not necessarily the most important…

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Decision Stumps

A decision stump is a decision tree with just one decision, leading to two or more leaves. For example, in this decision stump a borrower score of 0.475 or greater leads to a classification of “loan will default” while a borrower score less than 0.475…

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Miasma

As more information arrives about the Coronavirus, researchers point more and more to airborne particles and aerosols as the mechanism of spread. Photographic images of a sneeze, such as this one from Lydia Bourouiba at MIT (source here), have been seen by many. It turns…

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