lec4 - Friday 21st 1 Review Probability Independence...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Friday, 21st 1. Review: Probability: Independence: Counting: Two principles, Permutation (ordered sample) with re- placement, without replacement Example : A survey question lists seven pizza toppings and ask you to rank your favorite 3. How many possible answers to the survey question are there? One of the choince is 'olives', if all possible rankings are equally likely, what is the possibility that a ran- domly selected suvey has 'olives' in the top 3? Solution : Sample space Ω = { 1 , 2 , 3 , 4 , 5 , 6 , 7 } , n=7, and k=3. Per- mutation since order does matter so P (7 , 3) no replacement. Event with olives is E=(o,*,*),(*,*,o),(*,o,*) and possible answer according to E is P (6 , 2) × 3 and probability is P (6 , 2) /P (7 , 3) . 2. Combinations:(unordered samples) Experiment: A box has n items numbered 1 , ··· ,n . Select k ( ≤ n ) items without replacement. An item is drawn at most onece....
View Full Document

This note was uploaded on 02/01/2012 for the course STAT 330B taught by Professor Zhou during the Spring '11 term at Iowa State.

Page1 / 3

lec4 - Friday 21st 1 Review Probability Independence...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online