Homework3_solution

# Homework3_solution - people selected at random will be of...

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Reading assignment: Sections 3.1-3.3 Homework 3 Due next Monday September 20, 2010 Exercises Note: Since we only have automobiles with slight paint blemishes, BBB is not possible for this particular problem. Problem 5: A study examined national attitudes about antidepressants. The study revealed that approximately 70% believe “antidepressants do not really cure anything; they just cover up the real trouble.” According to this study, what is the probability that at least 2 of the next 5

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Unformatted text preview: people selected at random will be of this opinion? Hints: Let X = # of people among those 5 who are of that opinion. Then S x ={0,1,2,3,4,5} P[X ≥ 2] = 1- P[X<2] = 1-P[X=0]-P[X=1] P[X=0] = 5 3 . 7 . 5 =0.00243 P[X=1] = 4 1 3 . 7 . 1 5 =0.02835 The final numerical answer should be 0.96922....
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## This note was uploaded on 01/19/2012 for the course IEN 311 taught by Professor Qiu during the Spring '11 term at University of Miami.

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Homework3_solution - people selected at random will be of...

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