It’s a new book that’s out, by Allen Downey
About a variety of probability “paradoxes”… but mainly how we don’t think too well about probability/stats
I am not really promoting the book, which is here:
But that he has the code for his examples, for free, here:
I don’t really need his book. (I’ll probably buy it anyway) I do want his examples & code.
He does try to head it off and say “You won’t understand these examples without the introductory text in the book!”
HA HA I UNDERSTAND IT JUST FINE
Anyway, those are the cat risk examples
This one is a little odd:
PCA of human measurements
In a previous post I explored the correlations between measurements in the ANSUR-II dataset, which includes 93 measurements from a sample of U.S. military personnel. I found that measurements of the head were weakly correlated with measurements from other parts of the body – and in particular the protrusion of the ears is almost entirely uncorrelated with anything else.
Huh.
Meep, you’re teasing us with the conclusions about body parts without sharing some data.
I took the male only data, chose a few of the 93 measurements, and calculated correlation coefficients. I did not use PCA, but I selected the variables in the author’s principal component 6 about the head, and I added the last variable for fun:
