Class – Page 7 – William M. Briggs

Free Probability-Statistics Class: Predictive Case Study 1, Part XI

Review! We left off with comparing the standard, out-of-the-box linear regression with our multinomial predictive observable model. The great weaknesses of the regression were probability leakage (giving positive probability to…

Class Statistics

Free Probability-Statistics Class: Predictive Case Study 1, Part X

Review! Last time we created four models of CGPA. Which is correct? They all are. Why? I should ask as a homework question, but I'll remind us here. Since all…

Class Statistics

Free Probability-Statistics Class: Predictive Case Study 1, Part IX

Review! Last time we successfully computed our model (8): (8) Pr(CGPA = i | guesses of new measures, grading rules, old obs, model), where i = 0,...,5. The model…

Class Statistics

Free Data Science Class: Predictive Case Study 1, Part VIII

Review! We're continuing with the CGPA example. The data is on line, and of unknown origin, but good enough to use as an example. We will build a correlational model,…

Class Statistics

Free Data Science Class: Predictive Case Study 1, Part VII

Review! This is our last week of theory. Next week the practical side begins in earnest. However much fun that will be, and it will be a jolly time, this…

Class Statistics

Cliodynamics And The Lack Of A Hari Seldon

There will be no Hari Seldon. But there will be prophets. If there is no Seldon, there will be no psychohistory, the fictional astonishingly accurate mathematical science predicting gross human…

Class Statistics

Free Data Science Class: Predictive Case Study 1, Part VI

Review! This class is neither frequentist nor Bayesian nor machine learning in theory. It is pure probability, and unlike any other class available. And for the right price! Last time…

Class Statistics

What Is The Probability Of COVFEFE?

From a tweet from Taleb, who informs us the following question is part of the Indian Statistical Institute examination. (5) Mr.Trump decides to post a random message on Facebook and…

Brian (bulaoren) on What Are The Chances Of All These Scientists Dying, Killed, Or Going Missing?April 20, 2026
@Cary Motorcycle accident? No, that was due to covid.
Cary D Cotterman on What Are The Chances Of All These Scientists Dying, Killed, Or Going Missing?April 20, 2026
In the mid '70s I was the janitor at Cal Tech's Kerkhoff Marine Laboratory, where they studied the effects of…
Brian (bulaoren) on What Are The Chances Of All These Scientists Dying, Killed, Or Going Missing?April 20, 2026
I'm waiting for members of the California Coastal Commission to start disappearing.
Bill Hankel on What Are The Chances Of All These Scientists Dying, Killed, Or Going Missing?April 20, 2026
Thank you for your application of common sense (and math!) to this issue. I have never been a conspiracy theorist,…
Lucy Tucker on What Are The Chances Of All These Scientists Dying, Killed, Or Going Missing?April 20, 2026
You’re the best?????