Question 1

A manager has just received the expense checks for six of her employees.She randomly distributes the checks to the six employees.What is the probability that exactly five of them will receive the correct checks (checks with the correct names) ?

Accepted Answer

A)   1
B)   1/2
C)   1/6
D)   0
E)   1/3F) A) and D)
G) A) and C)

Question 2

If P(A) > 0 and P(B) > 0 and events A and B are independent,then ____________.

Accepted Answer

A)   P(
A)  = P(
B)  
B)   P(A|
B)  = P(
A)  
C)   P(A∩
B)  = 0
D)   P(A∩
B)  = P(
A)  P(Bυ
A)  E) A) and B)
F) A) and C)

Question 3

A(n) ____________ is the probability that one event will occur given that we know that another event already has occurred.

Accepted Answer

A)   sample space outcome
B)   subjective probability
C)   complement of events
D)   long-run relative frequency
E)   conditional probabilityF) B) and E)
G) B) and D)

Question 4

Two events are independent if the probability of one event is influenced by whether or not the other event occurs.

Accepted Answer

A) True 
 B)False

Question 5

The probability model describing an experiment consists of

Accepted Answer

A)   sample space.
B)   probabilities of the sample space outcomes.
C)   sample space and probabilities of the sample space outcomes.
D)   independent events.
E)   random variables.F) B) and E)
G) A) and D)

Question 6

The method of assigning probabilities when all outcomes are equally likely to occur is called the classical method.

Accepted Answer

A) True 
 B)False

Question 7

A(n) _____________ is the set of all of the distinct possible outcomes of an experiment.

Accepted Answer

A)   sample space
B)   union
C)   intersection
D)   observationE) All of the above
F) None of the above

Question 8

If two events are independent,we can _____________ their probabilities to determine the intersection probability.

Accepted Answer

A)   divide
B)   add
C)   multiply
D)   subtractE) B) and D)
F) B) and C)

Question 9

Mutually exclusive events have a nonempty intersection.

Accepted Answer

A) True 
 B)False

Question 10

Bayes' Theorem is always based on two states of nature and three experimental outcomes.

Accepted Answer

A) True 
 B)False

Question 11

When the probability of one event is not influenced by whether or not another event occurs,the events are said to be _____________.

Accepted Answer

A)   independent
B)   dependent
C)   mutually exclusive
D)   experimentalE) A) and D)
F) A) and C)

Question 12

If events A and B are mutually exclusive,then P(A∩B)is always equal to zero.

Accepted Answer

A) True 
 B)False

Question 13

Two mutually exclusive events having positive probabilities are ______________ dependent.

Accepted Answer

A)   always
B)   sometimes
C)   neverD) None of the above
E) All of the above

Question 14

What is the probability of at least one tail in the toss of three fair coins?

Accepted Answer

A)   1/8
B)   4/8
C)   5/8
D)   7/8
E)   6/8F) A) and E)
G) A) and D)

Question 15

Events that have no sample space outcomes in common,and therefore cannot occur simultaneously,are ____________.

Accepted Answer

A)   independent
B)   mutually exclusive
C)   intersections
D)   unionsE) A) and B)
F) B) and D)

Question 16

A probability may be interpreted as a long-run _____________ frequency.

Accepted Answer

A)   observational
B)   relative
C)   experimental
D)   conditionalE) A) and D)
F) C) and D)

Question 17

The set of all possible outcomes for an experiment is called a(n) ____________.

Accepted Answer

A)   sample space
B)   event
C)   experiment
D)   probabilityE) A) and B)
F) C) and D)

Question 18

If events A and B are independent,then P(A|B) is equal to _____________.

Accepted Answer

A)   P(
B)  
B)   P(A∩
B)  
C)   P(
A)  
D)   P(A υ 
B)  E) A) and D)
F) A) and C)

Question 19

What is the probability of rolling a value higher than eight with a pair of fair dice?

Accepted Answer

A)   6/36
B)   18/36
C)   10/36
D)   8/36
E)   12/36F) C) and E)
G) None of the above

Question 20

The ___________ of two events X and Y is another event that consists of the sample space outcomes belonging to either event X or event Y or both events X and Y.

Accepted Answer

A)   complement
B)   union
C)   intersection
D)   conditional probabilityE) B) and D)
F) All of the above

Exam 4: Probability

A(n) _____________ is the set of all of the distinct possible outcomes of an experiment.

Correct AnswerverifiedShow Answer

If P(A) > 0 and P(B) > 0 and events A and B are independent,then ____________.

Correct AnswerverifiedShow Answer

The ___________ of two events X and Y is another event that consists of the sample space outcomes belonging to either event X or event Y or both events X and Y.

Correct AnswerverifiedShow Answer

A manager has just received the expense checks for six of her employees.She randomly distributes the checks to the six employees.What is the probability that exactly five of them will receive the correct checks (checks with the correct names) ?

Correct AnswerverifiedShow Answer

If events A and B are independent,then P(A|B) is equal to _____________.

Correct AnswerverifiedShow Answer

Bayes' Theorem is always based on two states of nature and three experimental outcomes.

Correct AnswerverifiedShow Answer

Events that have no sample space outcomes in common,and therefore cannot occur simultaneously,are ____________.

Correct AnswerverifiedShow Answer

The set of all possible outcomes for an experiment is called a(n) ____________.

Correct AnswerverifiedShow Answer

The probability model describing an experiment consists of

Correct AnswerverifiedShow Answer

Mutually exclusive events have a nonempty intersection.

Correct AnswerverifiedShow Answer

The method of assigning probabilities when all outcomes are equally likely to occur is called the classical method.

Correct AnswerverifiedShow Answer

What is the probability of rolling a value higher than eight with a pair of fair dice?

Correct AnswerverifiedShow Answer

If events A and B are mutually exclusive,then P(A∩B)is always equal to zero.

Correct AnswerverifiedShow Answer

A(n) ____________ is the probability that one event will occur given that we know that another event already has occurred.

Correct AnswerverifiedShow Answer

If two events are independent,we can _____________ their probabilities to determine the intersection probability.

Correct AnswerverifiedShow Answer

Two events are independent if the probability of one event is influenced by whether or not the other event occurs.

Correct AnswerverifiedShow Answer

What is the probability of at least one tail in the toss of three fair coins?

Correct AnswerverifiedShow Answer

When the probability of one event is not influenced by whether or not another event occurs,the events are said to be _____________.

Correct AnswerverifiedShow Answer

A probability may be interpreted as a long-run _____________ frequency.

Correct AnswerverifiedShow Answer

Two mutually exclusive events having positive probabilities are ______________ dependent.

Correct AnswerverifiedShow Answer

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