ActivEpi Web, by David Kleinbaum, is the text used in two Statistics.com courses (Epidemiology Statistics and Designing Valid Studies), but it is really a rich multimedia web-based presentation of epidemiological statistics, serving the role of a unique textbook format for an introductory course in the subject. It is historically noteworthy – it dates back toContinue reading “Book Review: Active-Epi”
Daily Archives: December 10, 2018
Churn
Churn is a term used in marketing to refer to the departure, over time, of customers. Subscribers to a service may remain for a long time (the ideal customer), or they may leave for a variety of reasons (switching to a competitor, dissatisfaction, credit card expires, customer moves, etc.). A customer who leaves, for whatever reason, “churns.”
Eli Whitney and Google
This weekend (12/8/2018) marked the 253rd anniversary of the birth of Eli Whitney, inventor of the cotton gin. And 20 years ago, Google received its first big infusions of capital from, among others, Jeff Bezos, the founder of Amazon. Both Eli Whitney and the Google founders instigated economic revolutions, but also illustrate polar opposite approachesContinue reading “Eli Whitney and Google”