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I recently taught a session on Logistic Regression to a group of Lean Six Sigma Black Belts. It’s one of those seldom-used tools that many Black belt programs don’t cover and, perhaps, with good reason. The case study of the space shuttle “Challenger”, NASA’s ill-fated 25th space shuttle flight, is a common reference when presenting logistic regression (both binary and ordinal) and a reminder of the fallibility of the human condition. How much did launch delays and politica

Alternate titles: "Holiday Internet Usage" or... "Post-Holiday Season Internet Blues" Why, after only 10 days into my new billing cycle, would I be receiving an alert that 90% of my 125 GB monthly internet plan has been used up and I still have 20 days to go? I know that my average household usage over the last eight months has been 70-80 GB. I also know that my daughter worked in the city over the summer but came home for the December holiday break, (arrived December 21)

I have been on and off the phone with Google AdWords Express technical support for the last 20 hours and this has been an experience in customer service... but not the kind I would have expected from Google. The issue: Our firm, RPM-Academy (www.rpm-academy.com) has been running two ads for training courses over the last few weeks with each campaign (ad) offering having a dedicated landing page on our website (URL). The ads were set up correctly and recording "clicks" for w

When gathering data (sampling) from a population for the purpose of describing as well as making inferences on said population, randomization is essential. Why? "Random sampling eliminates bias by giving all individuals an equal chance to be chosen."(1) and, the “mathematical theorems that are the foundation for frequently used statistical procedures are based on this assumption”(2). When facilitating training in Six Sigma, I often “quiz” students after we have journeyed fo