Homework3

# Homework3 - that approximately 70% believe antidepressants...

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Reading assignment: Sections 3.1-3.3 Homework 3 Due next Monday September 20, 2010 Notes: (1) For odd number exercise problems, please refer to the numerical answers at the end of the textbook. Please make sure to provide the steps in order to obtain the full credit. (2) For problem 3.2, there are in total 8 possible outcomes. You only need to fill in the blanks to relate outcomes to variable values. Exercises 3.1 3.2 Please fill in the blanks 3.5 3.7 Problem 5: A study examined national attitudes about antidepressants. The study revealed
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Unformatted text preview: 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 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] The final numerical answer should be 0.96922. Please verify this....
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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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