Were the Colts’ footballs below the required 12.5 psi?

This is the excerpt for your very first post. Read More


Categorical Predictor Variables in Design of Experiments (DOE)

Inputs to designed experiments can fall into two general broad categories: Quantitative and Categorical (Qualitative). Quantitative inputs have scale or a direction measurement such as temperature and pressure. Categorical variables do not have scale – examples include vendor, day of week, and color. It is important to note that while you can assign a number… Read More

Logistic Regression Case Study Did Performance-Enhancing Drugs Favor Batters or Pitchers?

My previous article analyzing the performance of Barry Bonds and Roger Clemens has spurred quite a controversy. In the article, the statistics show that Roger Clemens’ performance was not statistically improved during the alleged performance-enhancing drug years. I often get comments from baseball fans; many of them are not swayed by the data. They are… Read More