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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola
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Solved: Probability and Honesty Based on the sample

Chapter 11, Problem 8 CRE

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QUESTION:

Problem  8CRE

Probability and Honesty Based on the sample described in the preceding exercise, assume that when someone is randomly selected, there is a 0.6 probability that the selected person believes that honesty is always the best policy.

a.  If four people are randomly selected, find the probability that they all believe that honesty is always the best policy.

b.  If someone is randomly selected, what is the probability that he or she does not believe that honesty is always the best policy?

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QUESTION:

Problem  8CRE

Probability and Honesty Based on the sample described in the preceding exercise, assume that when someone is randomly selected, there is a 0.6 probability that the selected person believes that honesty is always the best policy.

a.  If four people are randomly selected, find the probability that they all believe that honesty is always the best policy.

b.  If someone is randomly selected, what is the probability that he or she does not believe that honesty is always the best policy?

ANSWER:

Solution  8CRE

a)

The probability that four randomly selected persons believe that honesty is the best policy is: (0.6)(0.6)(0.6)(0.6)=0.129

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