Arnab Chakraborty kindly came to my new talk show, “The Central Equilibrium”, to talk about Bayes’ theorem. He introduced the concept of conditional probability, stated Bayes’ theorem in its simple and general forms, and showe...

Arnab Chakraborty kindly came to my new talk show, “The Central Equilibrium”, to talk about Bayes’ theorem. He introduced the concept of conditional probability, stated Bayes’ theorem in its simple and general forms, and showe...

It was a great pleasure to talk to Christopher Salahub about Markov chains in the second episode of my new talk show, The Central Equilibrium! Chris graduated from the University of Waterloo with a Bachelor of Mathematics degree in statistics. He just finished an internship in data development at Environics Analytics, and he is starting […]

I often need to work with many variables at a time in SAS, but I don’t like to type all of their names manually – not only is it messy to read, it also induces errors in transcription, even when copying and pasting. I recently learned of an elegant and efficient way to store multiple […]

I often create character variables (i.e. variables with strings of text as their values) in SAS, and they sometimes don’t render as expected. Here is an example involving the built-in data set SASHELP.CLASS. Here is the code: data c1; set sashelp.class; * define a new character variable to classify someone as tall or […]

Theoretical Background Many statisticians and data scientists use the correlation coefficient to study the relationship between 2 variables. For 2 random variables, and , the correlation coefficient between them is defined as their covariance scaled by the product of their standard deviations. Algebraically, this can be expressed as . In real life, you can never […]

In this second article of a 2-part series on the official JMP blog, I use analysis of variance (ANOVA) to assess a sample-preparation scheme for quantifying sodium in potato chips. I illustrate the use of the “Fit Y by X” platform in JMP to implement ANOVA, and I propose an alternative sample-preparation scheme to obtain […]

I am very excited to write again for the official JMP blog as a guest blogger! Today, the first article of a 2-part series has been published, and it is called “Potato Chips and ANOVA in Analytical Chemistry – Part 1: Formatting Data in JMP“. This series of blog posts will talk about analysis of […]

Yesterday, all 15 home teams in Major League Baseball won on the same day – the first such occurrence in history. CTV News published an article written by Mike Fitzpatrick from The Associated Press that reported on this event. The article states, “Viewing every game as a 50-50 proposition independent of all others, STATS figured the […]

Update on Wednesday, August 5, 2015: I am considering retracting this blog post based on my disagreement with Daniel Harris’ approach to building the warning and action lines in a control chart. Please see my replies to Jake Yeager and Lee Kennedy in the comments section for my thoughts. Your patience is appreciated; please stay […]