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…

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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…

Uncle Mike on Did The Pope Really Say Health Is A “Right”?March 30, 2026
There have been many bad popes, but also many wonderful ones. Pope Saint John Paul II was, well, saintly. His…
Brian (bulaoren) on Did The Pope Really Say Health Is A “Right”?March 30, 2026
If our rights derive from God, and if the pope is God's primary interlocutor (Pontifax Maximus) can we sue the…
Robert Arvanitis on Did The Pope Really Say Health Is A “Right”?March 30, 2026
You are correct in one point. The American enterprise, unlike all previous societies, is for all Men. Not based on…
Brian (bulaoren) on All Models Only Say What They Are Told To Say, And AI Is A ModelMarch 27, 2026
Logic, empiricism, wisdom... These solvents are without impact for people who have, so often, survived them. I believe this is…
spetzer86 on All Models Only Say What They Are Told To Say, And AI Is A ModelMarch 27, 2026
It's interesting that the commenters using AI prove the point that the use of a model yielding apparently random results…