q3solutions - Statistics 20: Quiz 3 Solutions October 11,...

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: Statistics 20: Quiz 3 Solutions October 11, 2006 1. Suppose you flip a fair coin 10 times and it results in 1 Tail and 9 Heads. If you toss that coin again, what is the probability of obtaining Heads on that toss? Provide an answer and then explain your reasoning in one sentence. P ( Heads ) = 1 2 . The result of this toss is independent of the results for past tosses, and a fair coin assigns equal probability to each outcome. 2. A raffle is being held, and people may purchase and write their name on as many tickets as theyd like. All of the tickets are placed in a hat, and then 3 tickets are drawn at random without replacement for prizes. You buy 8 tickets, and there are only 5 other tickets in the hat. What is the probability that you will win all 3 prizes? Round to 3 decimal places. Let X i , 1 i 3, record the name on the i th ticket selected from the hat. Let Y i = 1 if X i is your name and Y i = 0 otherwise. Tickets are chosen without replacement . Then the probability of winning all three prizes is: P ( Y 1 = 1 ,Y 2 = 1 ,Y 3 = 1) = P ( Y 1 = 1) P...
View Full Document

Page1 / 2

q3solutions - Statistics 20: Quiz 3 Solutions October 11,...

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