Quiz — Lecture 31

Section A from memory, one line each. Section B shows your reasoning - marks are for method, not final answers. Answers are discussed in class; the exit ticket goes on a card.

Section A

A1. Define expected value of an action.

A2. What is a flip point?

A3. What information does the host's opened door carry in the game show?

A4. EV is one decision rule; name another for catastrophic stakes.

Section B

B1. Umbrella: cost 2, rain cost 10, p = 0.3 - decide and give the flip point.

B2. Game show: enumerate three doors for stay vs switch.

Exit ticket

Answer one of these on your card in 60 seconds (choose any one):

1. What does expected value compare, and what does it ignore?

1. Why does switching win in cs-122?

1. When is a dominated strategy visible instantly?

Homework

• Before: skim the four student pages; attempt case 1 on paper.
• After: write a five-line pseudocode solution for any case you did not
• Enrichment (optional): the stretch question on each case page.