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CHAPTER 4: BASIC PROBABILITY
1. If two events are collectively exhaustive, what is the probability that one or the other occurs?
a) 0.
b) 0.50.
c) 1.00.
d) Cannot be determined from the information given.
ANSWER:c
2. If two events are collectively exhaustive, what is the probability that both occur at the same time?
a) 0.
b) 0.50.
c) 1.00.
d) Cannot be determined from the information given.
ANSWER:d
3. If two events are mutually exclusive, what is the probability that one or the other occurs?
a) 0.
b) 0.50.
c) 1.00.
d) Cannot be determined from the information given.
ANSWER:d
4. If two events are mutually exclusive, what is the probability that both occur at the same time?
a) 0.
b) 0.50.
c) 1.00.
d) Cannot be determined from the information given.
ANSWER:a
5. If two events are mutually exclusive and collectively exhaustive, what is the probability that both occur?
a) 0.
b) 0.50.
c) 1.00.
d) Cannot be determined from the information given.
ANSWER:a
6. If two events are mutually exclusive and collectively exhaustive, what is the probability that one or the other occurs?
a) 0.
b) 0.50.
c) 1.00.
d) cctmCannot be determined from the information given.
ANSWER:c
7. If events A and B are mutually exclusive and collectively exhaustive, what is the probab
ility that event A occurs?
a) 0.
b) 0.50.
c) 1.00.
d) Cannot be determined from the information given.
ANSWER:d
8. If two equally likely events A and B are mutually exclusive and collectively exhaustive, what is the probability that event A occurs?
a) 0.
b) 0.50.
c) 1.00.
d) Cannot be determined from the information given.
ANSWER:b
9. If two equally likely events A and B are mutually exclusive, what is the probability that event A occurs?
a) 0.
b) 0.50.
c) 1.00.
d) Cannot be determined from the information given.
ANSWER:d
10. about是什么意思If two equally likely events A and B are collectively exhaustive, what is the probability that event A occurs?
a) 0.
b) 0.50.
c) 1.00.be interested in
d) Cannot be determined from the information given.
ANSWER:d
11. Selection of raffle tickets from a large bowl is an example of
a) sampling with replacement.
b) sampling without replacement.
c) subjective probability.
d) None of the above.
ANSWER:b
12. If two events are independent, what is the probability that they both occur?
a) 0.
b) 0.50.
c) 1.00.
d) Cannot be determined from the information given.
ANSWER:d
13. If the outcome of event A is not affected by event B, then events A and B are said to be
a) mutually exclusive.
b) statistically independent.
c) collectively exhaustive.
d) None of the above.
xingji
qinhuangdaoANSWER:b
14. If event A and event B cannot occur at the same time, then events A and B are said to be
a) mutually exclusive.
b) api是什么statistically independent.
c) collectively exhaustive.
d) turnoutNone of the above.
ANSWER:a
15. If either event A or event B must occur, then events A and B are said to be
a) mutually exclusive.
b) statistically independent.
c) collectively exhaustive.
d) None of the above.
ANSWER:c
16. The collection of all possible events is called
a) a simple probability.
b) a sample space.
c) a joint probability.
d) the null t.
ANSWER:b
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17. All the events in the sample space that are not part of the specified event are called
a) simple events.
b) joint events.
c) the sample space.
d) the complement of the event.
ANSWER:d
18. Simple probability is also called
a) marginal probability.
b) joint probability.
c) conditional probability.
d) Bayes' theorem.
ANSWER:a
19. When using the general multiplication rule, P(A and B) is equal to
a) P(A|B)P(B).
b) P(A)P(B).
c) P(B)/P(A).
d) P(A)/P(B).
ANSWER:a
20. A business venture can result in the following outcomes (with their corresponding chance of occurring in parenthes): Highly Successful (10%), Successful (25%), Break Even (25%), Disappointing (20%), and Highly Disappointing (?). If the are the only outcomes possible for the business venture, what is the chance that the business venture will be considered Highly Disappointing?
a) 10%
b) 15%
c) 20%
d) 25%
ANSWER:c
21. A recent survey of banks revealed the following distribution for the interest rate being charged on a home loan (bad on a 30-year mortgage with a 10% down payment).
laiInterest Rate | 7.0% | 7.5% | 8.0% | 8.5% | > 8.5% |
Probability | 0.12 | 0.23 | 0.24 | 0.35 | 0.06 |
| | | | | |
If a bank is lected at random from this distribution, what is the chance that the interest rate charged on a home loan will exceed 8.0%?
a) 0.06
b) 0.41
c) 0.59
d) 1.00
ANSWER:b
22. The employees of a company were surveyed on questions regarding their educational background and marital status. Of the 600 employees, 400 had college degrees, 100 were single, and 60 were single college graduates. The probability that an employee of the company is single or has a college degree is:
a) 0.10
b) 0.25
c) 0.667
d) 0.733
ANSWER:d
23. The employees of a company were surveyed on questions regarding their educational background and marital status. Of the 600 employees, 400 had college degrees, 100 were single, and 60 were single college graduates. The probability that an employee of the company is married and has a college degree is:
