.. title: Engineering Probability Class 27 Thu 2022-04-21
.. slug: class27
.. date: 2022-04-21
.. tags: class
.. link: 
.. description: 
.. type: text
.. has_math: true

.. sectnum::
.. contents:: Table of contents::
..


No lecture today
----------------

In place of today's lecture, watch these videos, and discuss them next Mon.


Research By Design videos
=========================

#. 10-1 Guinness, Student, and the History of t Tests (16:58) https://www.youtube.com/watch?v=bqfcFCjaE1c

#. 12-2 ANOVA – Variance Between and Within (12:51)
   https://www.youtube.com/watch?v=fK_l63PJ7Og
   
#. 15-1 Why Non Parametric Statistics? (6.52)
   https://www.youtube.com/watch?v=xA0QcbNxENs

Crash course videos
===================
   
#. Chi-Square Tests: Crash Course Statistics #29 (11:03)
   https://www.youtube.com/watch?v=7_cs1YlZoug 
   
#. Regression: Crash Course Statistics #32 (12:40)
   https://www.youtube.com/watch?v=WWqE7YHR4Jc

   
MIT videos
==========

This is for students who find the above videos too simple.

https://ocw.mit.edu/courses/18-650-statistics-for-applications-fall-2016/pages/syllabus/

There are slides and videos.

Watch the Regression lectures: 13-16.




More counterintuitive stats
---------------------------

from current events.

Last year the number of deaths in the US increased by 15% from the year before.

Does that mean that life expectancy decreased by 15%?

(Answer: no.  It decreased by a year or 2.)


Simpson's paradox
-----------------

is the formal name for the school admission paradox that I showed you earlier.

https://en.wikipedia.org/wiki/Simpson%27s_paradox

It links to several other paradoxes.