m3355final

# m3355final - MATH 33551 FINAL EXAM Spring 2009 You may...

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

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MATH 33551 FINAL EXAM Spring 2009 You may leave answers in terms of binomial coefficients, when applicable. ** SHOW ALL WORK ** (17) 1. A 2007 study showed that 17% of the citizens of Hawaii are smokers. Let X be the number of smokers in a randomly selected group of 35 Hawaii citizens. (i) Treating X as a binomial random variable, find the probability that X is at least 2. (ii) Now treat X as a Poisson random variable and again compute the probability that X is at least 2. (iii) People are picked at random from this group of 35 citizens until a smoker is found. What is the probability that the first smoker found is the 4th person picked? (iv) Approximating the binomial random variable X by a normal random variable, find the probability that X = 7. (Recall that the standard deviation of a binomial r.v. is npq . A table for the function appears on the last page of this exam.) (9) 2. Let A and B be events in a sample space such that P ( A ) = 0 . 4 , P ( B ) = 0 . 7, and P ( AB ) = 0...
View Full Document

## This note was uploaded on 11/29/2011 for the course MATH 3355 taught by Professor Britt during the Spring '08 term at LSU.

### Page1 / 2

m3355final - MATH 33551 FINAL EXAM Spring 2009 You may...

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

View Full Document
Ask a homework question - tutors are online