STAT 2507A &acirc;€“ Week 4 - June 10

# STAT 2507A - STAT2507AWeek4 June8 JerrySitu 5.35.4 Summery2009 1 Exercise a b c ,8of exam. 7.5 12.1 16 Excercise 1 2 3 You

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1 STAT 2507A – Week 4 –  June 8 Jerry Situ 5.3-5.4 Summery 2009

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Exercise Out of your class of 20 students, 8 of  the students cheated on the final  exam. If you randomly select 10  students what is the probability that  you will get exactly 2 cheaters? a) 7.5% b) 12.1% c) 16%
Excercise You flip a coin 10 times. You get 4  Heads, and 6 Tails. Let X be the  number of heads in the 10 flips. What  is your distribution: 1) Bin(10, 0.4) 2) Bin(10, 0.5) 3) Bin(10, 0.6)

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POISSON DISTRIBUTION Pois( λ ) Used to model the number of occurrences of a  given random event during a specified period of  time or in a specified region Examples : number of orders received in a one week period number of defects in an automobile number of misprints on a page number of arrivals at a bank counter between 10  and 11 a.m.
λ ) If  λ is the average number of occurrences in the given  time interval or region, the probability of exactly x  occurrences is: X = 0,1,2,…. . E(X) = VAR(X) =  λ P X x e x x ( ) ! , = =

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## This note was uploaded on 05/24/2011 for the course STAT 2507 taught by Professor Masoudmollaalizadehnasari during the Summer '09 term at Carleton CA.

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STAT 2507A - STAT2507AWeek4 June8 JerrySitu 5.35.4 Summery2009 1 Exercise a b c ,8of exam. 7.5 12.1 16 Excercise 1 2 3 You

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