• Announcements: Please remember that HW2 is due today by 11.59pm EST. Next Monday (Feb 21) is a holiday observed at CUNY, so our next class is on Wednesday (Feb 23), and it will also be held remotely/asynchronously. Always check the day-by-day calendar on the course website for the latest updated information on our class schedule and modality for each class.

• Video 1: Bayes' Formula and a first exercise: Download file or watch below

• Video 2: Efficacy of multiple-choice exams: Download file or watch below

• Video 3: Monty Hall problem explained with Bayes' Formula: Download file or watch below

Some other interesting things about Monty Hall:

• Play the Monty Hall problem yourself (or run a large simulation on demand): here

• A website that explains Monty Hall in many different nice ways: here

• Are pigeons better at understanding Monty Hall than mathematicians? here

• Video 4: The issue of false positives: Download file or watch below