Question 1

Following up on the preceding question, suppose that you found that 27 of the new hires were women. You would probably be justified in concluding that

Accepted Answer

A)   there was discrimination against men.
B)   there was discrimination against women.
C)   there was no discrimination on the basis of gender.
D)   we don't have enough information to even start to answer the question.

Question 2

If a set of events contains all of the possible outcomes, it is said to be

Accepted Answer

A)   mutually exclusive.
B)   independent.
C)   dependent.
D)   exhaustive.

Question 3

Which of the following is NOT an appropriate use of probability?

Accepted Answer

A)   estimating the likelihood that a particular event will occur
B)   calculating your chances of winning the lottery
C)   placing bets at the track
D)   knowing what event will happen next

Question 4

If the probability is .90 that a student taking this class is a Psychology major, and the probability that a student in this class has red hair is .05, then the joint probability of being a Psychology major and a red head in this class is .95.

Accepted Answer

A) True 
 B)False

Question 5

Two events are mutually exclusive when

Accepted Answer

A)   the occurrence of one event is independent of the occurrence of the other.
B)   the occurrence of one event precludes the occurrence of the other.
C)   both events are equally likely.
D)   the first event precedes the second event.

Question 6

One difference between the additive and the multiplicative rules that helps us remember when to use which is

Accepted Answer

A)   with the additive rule we are talking about the occurrence of one of several outcomes.
B)   with the multiplicative rule we are talking about the occurrence of more than one kind of outcome.
C)   the two rules are interchangeable.
D)   both a and b

Question 7

A kindergarten teacher assigns chores to her students on a weekly basis. One student works on each task, and each student is assigned only one task a week. During the first week of school, there were 20 students and 7 tasks. Also, 4 of the students had brown hair. 
a. What is the probability that a student would not be assigned a chore? 
b. What is the probability that a student had brown hair? 
c. What is the probability that a student had brown hair or had a chore? 
d. What is the probability that a student had brown hair and a chore?

Accepted Answer

a. .65
b....

Question 8

When we sample with replacement we

Accepted Answer

A)   only use subjects who have been selected on two separate occasions.
B)   put the outcome back in the pool before sampling again.
C)   hold all outcomes out of the pool once they have been drawn.
D)   have probabilities that change after each draw.

Question 9

If I am drawing observations out of a hat while sampling with replacement, the probability of drawing a certain outcome

Accepted Answer

A)   remains constant across all draws.
B)   changes as I continue drawing objects.
C)   decreases as I continue to draw objects.
D)   none of the above

Question 10

Explain why it is important to know if someone is sampling with or without replacement when calculating the probability of multiple events.

Accepted Answer

This affects the total number of possibl...

Question 11

When we want to calculate the probability of the joint occurrence of two or more independent events, we invoke

Accepted Answer

A)   the multiplicative rule.
B)   the additive rule.
C)   the sum of independent probabilities.
D)   Bernoulli's rule.

Question 12

Which of the following events are most likely to be independent?

Accepted Answer

A)   your score on your biology midterm and your score on the biology final
B)   your mother's attitudes about religion and your father's attitudes about religion
C)   the sex of your cousin's first child and the sex of your cousin's second child
D)   your philosophy professor's opinion on the meaning of life and your subsequent opinion on the meaning of life

Question 13

A frequentistic approach to probability is likely to be invoked

Accepted Answer

A)   in predicting the weather.
B)   in calculating the chances of winning in craps.
C)   in estimating the probability that a sharpshooter will score a bull's eye.
D)   in blackjack.

Question 14

The probability of getting heads twice when flipping a coin 2 times is .50.

Accepted Answer

A) True 
 B)False

Question 15

I have a hunch that tomorrow is going to be a bad day. This is an example of the subjective probability.

Accepted Answer

A) True 
 B)False

Question 16

Dealing 5 cards from a standard deck is an example of sampling with replacement.

Accepted Answer

A) True 
 B)False

Question 17

When we are talking about joint probabilities we are likely to invoke

Accepted Answer

A)   the multiplicative rule.
B)   the additive rule.
C)   the subjective probability rule.
D)   the law of joint probabilities.

Question 18

Using the example from the text about the supermarket fliers, when we calculate the probability that a flier will be left either among the canned goods or in the bottom of the shopping cart, we need to invoke

Accepted Answer

A)   the additive rule.
B)   the superlative rule.
C)   the dependence rule.
D)   the multiplicative rule.

Question 19

p(getting a job | knowing the manager)  is the notation for the probability of

Accepted Answer

A)   getting a job or knowing the manager.
B)   getting a job and knowing the manager.
C)   getting a job given that you know the manager.
D)   getting a job and not knowing what to give the manager.

Question 20

A professor rated how frequently students actively participated in class and then calculated the probability of getting various grades broken down by participation. The data follow: 
  
a. What is the simple probability of getting an A? 
b. What is the probability of getting an A given the student participated frequently? 
c. What is the simple probability of failing? 
d. What is the probability of failing given the student participated rarely/never?

Accepted Answer

a. .10
b....

Exam 7: Basic Concepts of Probability

When we want to calculate the probability of the joint occurrence of two or more independent events, we invoke

Correct Answer
verified

A frequentistic approach to probability is likely to be invoked

Correct Answer
verified

I have a hunch that tomorrow is going to be a bad day. This is an example of the subjective probability.

Correct Answer
verified

Explain why it is important to know if someone is sampling with or without replacement when calculating the probability of multiple events.

Correct Answer
verified
This affects the total number of possibl...
View Answer

Following up on the preceding question, suppose that you found that 27 of the new hires were women. You would probably be justified in concluding that

Correct Answer
verified

Which of the following events are most likely to be independent?

Correct Answer
verified

If I am drawing observations out of a hat while sampling with replacement, the probability of drawing a certain outcome

Correct Answer
verified

Which of the following is NOT an appropriate use of probability?

Correct Answer
verified

If the probability is .90 that a student taking this class is a Psychology major, and the probability that a student in this class has red hair is .05, then the joint probability of being a Psychology major and a red head in this class is .95.

Correct Answer
verified

p(getting a job | knowing the manager) is the notation for the probability of

Correct Answer
verified

Using the example from the text about the supermarket fliers, when we calculate the probability that a flier will be left either among the canned goods or in the bottom of the shopping cart, we need to invoke

Correct Answer
verified

When we sample with replacement we

Correct Answer
verified

If a set of events contains all of the possible outcomes, it is said to be

Correct Answer
verified

The probability of getting heads twice when flipping a coin 2 times is .50.

Correct Answer
verified

Correct Answer
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a. .10
b....
View Answer

Correct Answer
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a. .65
b....
View Answer

Dealing 5 cards from a standard deck is an example of sampling with replacement.

Correct Answer
verified

One difference between the additive and the multiplicative rules that helps us remember when to use which is

Correct Answer
verified

When we are talking about joint probabilities we are likely to invoke

Correct Answer
verified

Two events are mutually exclusive when

Correct Answer
verified

Exam 7: Basic Concepts of Probability

When we want to calculate the probability of the joint occurrence of two or more independent events, we invoke

Correct AnswerverifiedShow Answer

A frequentistic approach to probability is likely to be invoked

Correct AnswerverifiedShow Answer

I have a hunch that tomorrow is going to be a bad day. This is an example of the subjective probability.

Correct AnswerverifiedShow Answer

Explain why it is important to know if someone is sampling with or without replacement when calculating the probability of multiple events.

Correct AnswerverifiedThis affects the total number of possibl...View AnswerShow Answer

Following up on the preceding question, suppose that you found that 27 of the new hires were women. You would probably be justified in concluding that

Correct AnswerverifiedShow Answer

Which of the following events are most likely to be independent?

Correct AnswerverifiedShow Answer

If I am drawing observations out of a hat while sampling with replacement, the probability of drawing a certain outcome

Correct AnswerverifiedShow Answer

Which of the following is NOT an appropriate use of probability?

Correct AnswerverifiedShow Answer

If the probability is .90 that a student taking this class is a Psychology major, and the probability that a student in this class has red hair is .05, then the joint probability of being a Psychology major and a red head in this class is .95.

Correct AnswerverifiedShow Answer

p(getting a job | knowing the manager) is the notation for the probability of

Correct AnswerverifiedShow Answer

Using the example from the text about the supermarket fliers, when we calculate the probability that a flier will be left either among the canned goods or in the bottom of the shopping cart, we need to invoke

Correct AnswerverifiedShow Answer

When we sample with replacement we

Correct AnswerverifiedShow Answer

If a set of events contains all of the possible outcomes, it is said to be

Correct AnswerverifiedShow Answer

The probability of getting heads twice when flipping a coin 2 times is .50.

Correct AnswerverifiedShow Answer

Correct Answerverifieda. .10 b....View AnswerShow Answer

Correct Answerverifieda. .65 b....View AnswerShow Answer

Dealing 5 cards from a standard deck is an example of sampling with replacement.

Correct AnswerverifiedShow Answer

One difference between the additive and the multiplicative rules that helps us remember when to use which is

Correct AnswerverifiedShow Answer

When we are talking about joint probabilities we are likely to invoke

Correct AnswerverifiedShow Answer

Two events are mutually exclusive when

Correct AnswerverifiedShow Answer

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This affects the total number of possibl...
View Answer

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a. .10
b....
View Answer

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a. .65
b....
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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