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dl

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A contingency table is a tabular summary of probabilities concerning two sets of complementary

events.

true

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

event occurs.

falso

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A subjective probability is a probability assessment that is based on experience, intuitive judgment, or

expertise.

true

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The probability of an event is the sum of the probabilities of the sample space outcomes that

correspond to the event.

true

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

are referred to as independent events.

false

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A manager has just received the expense checks for six of her employees. She randomly distribute

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)?

0

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If two events are independent, we can _____ their probabilities to determine the intersection

probability.

multiply

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

are:

Mutually Exclusive

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If events A and B are independent, then the probability of simultaneous occurrence of event A and

event B can be found with:

All of the above are correct

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A ____________ is the probability that one event will occur given that we know that another event

already has occurred.

Conditional probability

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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 event X and Y.

Union

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The _____ of an event is a number that measures the likelihood that an event will occur when an

experiment is carried out.

Probability

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When the probability of one event is influenced by whether or not another event occurs, the events are

said to be _____.

Dependent

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When the probability of one event is not influenced by whether or not another event occurs, the events

are said to be _____.

Independent

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A(n) _______________ probability is a probability assessment that is based on experience, intuitive

judgment, or expertise.

Subjective

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Probabilities must be assigned to experimental outcomes so that the probabilities of all the

experimental outcomes must add up to ___.

1

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Probabilities must be assigned to experimental outcomes so that the probability assigned to each

experimental outcome must be between ____ and ____ inclusive.

0 and 1

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The __________ of event X consists of all sample space outcomes that do not correspond to the

occurrence of event X.

Complement

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The _______ of two events A and B is another event that consists of the sample space outcomes

belonging to either event A or event B or both event A and B.

Union

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The _______ of two events A and B is the event that consists of the sample space outcomes belonging

to both event A and event B.

intersection

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If we consider the toss of four coins as an experiment, how many outcomes does the sample space

consist of?

16

###
A lot contains 12 items, and 4 are defective. If three items are drawn at random from the lot, what is

the probability they are not defective?

0.2545

### A person has dealt 5 cards from a deck of 52 cards. What is the probability they are all clubs?

0.0005

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A group has 12 men and 4 women. If 3 people are selected at random from the group, what is the

probability that they are all men?

0.3929

###
Container 1 has 8 items, 3 of which are defective. Container 2 has 5 items, 2 of which are defective. I

one item is drawn from each container:

What is the probability that both items are not defective?

A. 0.3750

###
Container 1 has 8 items, 3 of which are defective. Container 2 has 5 items, 2 of which are defective. If

one item is drawn from each container:

What is the probability that the item from container one is defective and the item from container 2 is

not defective?

0.2250

###
Container 1 has 8 items, 3 of which are defective. Container 2 has 5 items, 2 of which are defective. If

one item is drawn from each container:

What is the probability that one of the items is defective?

0.4500

### Suppose P(A) = .45, P(B) = .20, P(C) = .35, P(E|A) = .10, P(E|B) = .05, and P(E|C) = 0. What is P(E)?

.055

###
Suppose P(A) = .45, P(B) = .20, P(C) = .35, P(E|A) = .10, P(E|B) = .05, and P(E|C) = 0. What is P(A

E)?

.818

###
Suppose P(A) = .45, P(B) = .20, P(C) = .35, P(E|A) = .10, P(E|B) = .05, and P(E|C) = 0. What is P(B|

E)?

.182

###
Suppose P(A) = .45, P(B) = .20, P(C) = .35, P(E|A) = .10, P(E|B) = .05, and P(E|C) = 0. What is P (

E)?

0

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Given the standard deck of cards, what is the probability of drawing a red card, given that it is a face

card?

.5

###
Given a standard deck of cards, what is the probability of drawing a face card, given that it is a red

card?

.231

###
A machine is made up of 3 components: an upper part, a mid part, and a lower part. The machine is

then assembled. 5 percent of the upper parts are defective; 4 percent of the mid parts are defective; 1

percent of the lower parts are defective. What is the probability that a machine is non-defective?

.903

###
A machine is produced by a sequence of operations. Typically one defective machine is produced per

1000 parts. What is the probability of two non-defective machines being produced?

0.998

###
A pair of dice is thrown. What is the probability that one of the faces is a 3, given that the sum of the

two faces is 9?

1/4

###
A card is drawn from a standard deck. What is the probability the card is an ace, given that it is a

club?

1/13

###
A card is drawn from a standard deck. Given that a face card is drawn, what is the probability it will

be a king?

1/3

###
Independently a coin is tossed, a card is drawn from a deck, and a die is thrown. What is the

probability of observing a head on the coin, an ace on the card, and a five on the die?

.0064

### A family has two children. What is the probability that both are girls, given that at least one is a girl?

1/3

###
What is the probability of winning four games in a row, if the probability of winning each game

individually is 1/2

1/16

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At a college, 70 percent of the students are women and 50 percent of the students receive a

grade of C. 25 percent of the students are neither female nor C students. Use this contingency

.45

###
At a college, 70 percent of the students are women and 50 percent of the students receive a

grade of C. 25 percent of the students are neither female nor C students. Use this contingency

.25

###
At a college, 70 percent of the students are women and 50 percent of the students receive a

grade of C. 25 percent of the students are neither female nor C students. Use this contingency

.17

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At a college, 70 percent of the students are women and 50 percent of the students receive a

grade of C. 25 percent of the students are neither female nor C students. Use this contingency

If the student has received a grade of C, what is the probability that he is male?

0.10