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Copyright © 2009 Pearson Education, Inc. Publishing as Prentice Hall.
CHAPTER 2
Probability Concepts and Applications
TRUE/FALSE
2.1
Subjective probability implies that we can measure the relative frequency of the values of the
random variable.
ANSWER: FALSE {moderate, FUNDAMENTAL CONCEPTS}
2.2
The use of "expert opinion" is one way to approximate subjective probability values.
ANSWER: TRUE {easy, FUNDAMENTAL CONCEPTS}
2.3
Mutually exclusive events exist if only one of the events can occur on any one trial.
ANSWER: TRUE {moderate, MUTUALLY EXCLUSIVE AND COLLECTIVELY
EXHAUSTIVE EVENTS}
2.4
Stating that two events are statistically independent means that the probability of one event
occurring is independent of the probability of the other event having occurred.
ANSWER: TRUE {moderate, STATISTICALLY INDEPENDENT EVENTS}
2.5
Saying that a set of events is collectively exhaustive implies that one of the events must occur.
ANSWER: TRUE {moderate, MUTUALLY EXCLUSIVE AND COLLECTIVELY
EXHAUSTIVE EVENTS}
2.6
Saying that a set of events is mutually exclusive and collectively exhaustive implies that one and
only one of the events can occur on any trial.
ANSWER: TRUE {moderate, MUTUALLY EXCLUSIVE AND COLLECTIVELY
EXHAUSTIVE EVENTS}
2.7
A posterior probability is a revised probability.
ANSWER: TRUE {moderate, REVISING PROBABILITIES WITH BAYES’ THEOREM}
2.8
Bayes' rule enables us to calculate the probability that one event takes place knowing that a
second event has or has not taken place.
ANSWER: TRUE {moderate, REVISING PROBABILITIES WITH BAYES’ THEOREM}
2.9 A probability density function is a mathematical way of describing Bayes’ Theorem.
ANSWER: FALSE {moderate, PROBABILITY DISTRIBUTIONS}
Probability Concepts and Applications CHAPTER 2
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