Si - week 3 worksheet

Si - week 3 worksheet - MATH 218 SI Session (Fall 2008)...

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

View Full Document Right Arrow Icon
MATH 218 SI Session (Fall 2008) Week 3 Worksheet (09/08 09/14) SI Leader: Joy Chen zuoyiche@usc.edu Prof. Lin & Prof. Song www.usc.edu/si Topics Stressed: Probability Trees, Bayes’ Theorem, Discrete Probability Distribution 1. On the first day of classes at UCLA, Tommy realized that he was not happy at the school but he wasn’t the only one. In fact, 55% of the students at the school are not happy. His friend Bob is a happy UCLA student who chose not to leave, and he represents 37.35% of the population. The probability that an unhappy student will stay at UCLA is 21%. Assume that all UCLA students who leave transfer to USC. a. Design a probability tree and insert the probabilities for each branch. b. What is the probability that a student will be unhappy and transfer to USC? c. What is the probability of students staying at UCLA? d. Tommy decided to transfer to USC. What is the probability that a person who transferred out was actually happy at UCLA? 2. A telemarketer sells magazine subscriptions over the telephone. The probability of no answer is 60%. If there is an answer, the probability of 0, 1, or 2 magazine subscriptions is .5, .3, and .2, respectively. a.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/30/2009 for the course MATH 39514 taught by Professor He during the Fall '08 term at USC.

Page1 / 3

Si - week 3 worksheet - MATH 218 SI Session (Fall 2008)...

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