Exam 6: Probability

Drunk Drivers Six hundred accidents that occurred on a Saturday night were analyzed.Two items noted were the number of vehicles involved and whether alcohol played a role in the accident.The numbers are shown below: -{Drunk Drivers Narrative} If 3 vehicles were involved, what proportion of accidents involved alcohol?

(Short Answer)

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Question 101

Suppose A and B are two independent events for which P(A) = 0.20 and P(B) = 0.60. a. Find P(A and B). b. Find P(A or B).

(Short Answer)

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Question 102

Which of the following is an approach to assigning probabilities?

(Multiple Choice)

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Question 103

Financial Consultants A Financial Consultant has classified his clients according to their gender and the composition of their investment portfolio (primarily bonds, primarily stocks, or a balanced mix of bonds and stocks).The proportions of clients falling into the various categories are shown in the following table: One client is selected at random, and two events A and B are defined as follows: A: The client selected is male. B: The client selected has a balanced portfolio. -{Financial Consultants Narrative} Find P(A and B).

(Short Answer)

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Question 104

Drunk Drivers Six hundred accidents that occurred on a Saturday night were analyzed.Two items noted were the number of vehicles involved and whether alcohol played a role in the accident.The numbers are shown below: -{Drunk Drivers Narrative} What proportion of accidents involved alcohol or a single vehicle?

(Short Answer)

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Question 105

Condo Sales and Interest Rates The probability that condo sales will increase in the next 6 months is estimated to be 0.30.The probability that the interest rates on condo loans will go up in the same period is estimated to be 0.75.The probability that condo sales or interest rates will go up during the next 6 months is estimated to be 0.90. -{Condo Sales and Interest Rates Narrative} What is the probability that neither condo sales nor interest rates will increase during the next six months?

(Short Answer)

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Question 106

If two events are mutually exclusive, what is the probability that one or the other occurs?

(Multiple Choice)

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Question 107

Conditional probabilities are also called likelihood probabilities.

(True/False)

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Question 108

Mutual Fund Price An investor estimates that there is a 75% chance that a particular mutual fund's price will increase to $100 per share over the next three weeks, based on past data. -{Mutual Fund Price Narrative} Which approach was used to produce this figure?

(Essay)

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Question 109

Messenger Service Three messenger services deliver to a small town in Oregon.Service A has 60% of all the scheduled deliveries, service B has 30%, and service C has the remaining 10%.Their on-time rates are 80%, 60%, and 40% respectively.Define event O as a service delivers a package on time. -{Messenger Service Narrative} If a package was delivered on time, what is the probability that it was service B?

(Essay)

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Question 110

Posterior probability of an event is the revised probability of the event after new information is available.

(True/False)

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Question 111

Tea and Seltzer Suppose 55 percent of adults drink tea, 45 percent drink seltzer, and 10 percent drink both. -{Tea and Seltzer Narrative} What is the probability that a randomly chosen adult does not drink seltzer?

(Short Answer)

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Question 112

The intersection of events A and B is the event that occurs when:

(Multiple Choice)

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Question 113

Suppose two events A and B are related.The ____________________ probability of A is the probability that A occurs, regardless of whether event B occurred or not.

(Short Answer)

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Question 114

A survey of a magazine's subscribers indicates that 50% own a house, 80% own a car, and 90% of the homeowners also own a car.What proportion of subscribers: a. own both a car and a house? b. own a car or a house, or both? c. own neither a car nor a house?

(Short Answer)

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Question 115

If the event of interest is A, the probability that A will not occur is the complement of A.

(True/False)

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Question 116

College Professorship A Ph.D.graduate has applied for a job with two colleges: A and B.The graduate feels that she has a 60% chance of receiving an offer from college A and a 50% chance of receiving an offer from college B.If she receives an offer from college B, she believes that she has an 80% chance of receiving an offer from college A.Let A = receiving an offer from college A, and let B = receiving an offer from college B. -{College Professorship Narrative} What is the probability that both colleges will make her an offer?

(Short Answer)

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Question 117

If A and B are any two events with P(A) = .8 and P(B|A^c) = .7, then P(A^c and B) is

(Multiple Choice)

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Question 118

If P(A) = 0.20, P(B) = 0.30, and P(A and B) = 0, then A and B are:

(Multiple Choice)

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Question 119

Prior probabilities can be calculated using the multiplication rule for mutually exclusive events.

(True/False)

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Question 120

Showing 101 - 120 of 234

Suppose A and B are two independent events for which P(A) = 0.20 and P(B) = 0.60. a. Find P(A and B). b. Find P(A or B).

Which of the following is an approach to assigning probabilities?

If two events are mutually exclusive, what is the probability that one or the other occurs?

Conditional probabilities are also called likelihood probabilities.

Mutual Fund Price An investor estimates that there is a 75% chance that a particular mutual fund's price will increase to $100 per share over the next three weeks, based on past data. -{Mutual Fund Price Narrative} Which approach was used to produce this figure?

Posterior probability of an event is the revised probability of the event after new information is available.

Tea and Seltzer Suppose 55 percent of adults drink tea, 45 percent drink seltzer, and 10 percent drink both. -{Tea and Seltzer Narrative} What is the probability that a randomly chosen adult does not drink seltzer?

The intersection of events A and B is the event that occurs when:

Suppose two events A and B are related.The ____________________ probability of A is the probability that A occurs, regardless of whether event B occurred or not.

A survey of a magazine's subscribers indicates that 50% own a house, 80% own a car, and 90% of the homeowners also own a car.What proportion of subscribers: a. own both a car and a house? b. own a car or a house, or both? c. own neither a car nor a house?

If the event of interest is A, the probability that A will not occur is the complement of A.

If A and B are any two events with P(A) = .8 and P(B|A^c) = .7, then P(A^c and B) is

If P(A) = 0.20, P(B) = 0.30, and P(A and B) = 0, then A and B are:

Prior probabilities can be calculated using the multiplication rule for mutually exclusive events.

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

Numerical Descriptive Techniques

Data Collection and Sampling

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlation

Multiple Regression

Filters

Exam 6: Probability

Suppose A and B are two independent events for which P(A) = 0.20 and P(B) = 0.60. a. Find P(A and B). b. Find P(A or B).

Which of the following is an approach to assigning probabilities?

If two events are mutually exclusive, what is the probability that one or the other occurs?

Conditional probabilities are also called likelihood probabilities.

Mutual Fund Price An investor estimates that there is a 75% chance that a particular mutual fund's price will increase to $100 per share over the next three weeks, based on past data. -{Mutual Fund Price Narrative} Which approach was used to produce this figure?

Posterior probability of an event is the revised probability of the event after new information is available.

Tea and Seltzer Suppose 55 percent of adults drink tea, 45 percent drink seltzer, and 10 percent drink both. -{Tea and Seltzer Narrative} What is the probability that a randomly chosen adult does not drink seltzer?

The intersection of events A and B is the event that occurs when:

Suppose two events A and B are related.The ____________________ probability of A is the probability that A occurs, regardless of whether event B occurred or not.

A survey of a magazine's subscribers indicates that 50% own a house, 80% own a car, and 90% of the homeowners also own a car.What proportion of subscribers: a. own both a car and a house? b. own a car or a house, or both? c. own neither a car nor a house?

If the event of interest is A, the probability that A will not occur is the complement of A.

If A and B are any two events with P(A) = .8 and P(B|Ac) = .7, then P(Ac and B) is

If P(A) = 0.20, P(B) = 0.30, and P(A and B) = 0, then A and B are:

Prior probabilities can be calculated using the multiplication rule for mutually exclusive events.

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

Numerical Descriptive Techniques

Data Collection and Sampling

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlation

Multiple Regression

Filters

If A and B are any two events with P(A) = .8 and P(B|A^c) = .7, then P(A^c and B) is