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Consider a chance experiment that consists of selecting a customer at random from all people who purchased a car at a large car dealership during 2010 . a. In the context of this chance experiment, give an example of two events that would be mutually exclusive. b. In the context of this chance experiment, give an example of two events that would not be mutually exclusive.

Short Answer

Expert verified
Mutually exclusive events: 'The customer purchased a car in January 2010' and 'The customer purchased a car in February 2010'. Non-mutually exclusive events: 'The customer purchased a sedan' and 'The customer purchased a blue car'.

Step by step solution

01

Identify Mutually Exclusive Events

Begin by considering the nature of mutually exclusive events - events that can't occur simultaneously. In this case, an example could be: 'The customer purchased a car in January 2010' and 'The customer purchased a car in February 2010'. These are mutually exclusive because a single customer can't simultaneously purchase a car in both January and February.
02

Identify Non-Mutually Exclusive Events

Next, consider the nature of non-mutually exclusive events - events that can occur simultaneously. In this case, an example could be: 'The customer purchased a sedan' and 'The customer purchased a blue car'. These are non-mutually exclusive because a single customer can purchase a car that is both a sedan and blue at the same time.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Chance Experiment
When we talk about a chance experiment, we're referring to any process that can produce a range of outcomes, with the particular outcome often uncertain. In the context of our car dealership scenario, the experiment involves randomly selecting a customer who purchased a car in 2010. The randomness ensures that every customer has an equal opportunity to be chosen, making it uncertain as to which customer it will be.

Some common examples of chance experiments beyond our car dealership scenario include rolling a die, flipping a coin, or drawing a card from a deck. Each of these activities can produce various outcomes and are fundamental in studying probability and statistics. Through understanding chance experiments, students get a grasp of how randomness and probability influence outcomes in real-world situations.
Non-mutually Exclusive Events
In the realm of probability theory, non-mutually exclusive events are scenarios where the occurrence of one event does not preclude the occurrence of another. These types of events can happen at the same time. For instance, as per the car dealership example provided, a customer buying a sedan and a customer selecting a blue car are non-mutually exclusive events. A customer could indeed purchase a blue sedan, fulfilling both conditions concurrently.

Understanding non-mutually exclusive events is crucial because the probability calculations differ from those of mutually exclusive events. When calculating the probability of either event occurring, we have to consider the chance of them occurring together. This is especially important when dealing with complex situations where multiple events could happen simultaneously.
Probability Theory
At its core, probability theory is a branch of mathematics that deals with quantifying the likelihood of events occurring. It provides a mathematical framework to reason about uncertainties and is pivotal in various fields such as finance, insurance, science, and engineering. In our example involving the car dealership, probability theory would allow us to calculate the likelihood of various scenarios, such as the chance of selecting a customer who bought a car in January or the probability that a customer bought a blue sedan.

The foundation of probability theory lies in the concept of a probability space, which encompasses all possible outcomes of a chance experiment, and the probabilities associated with each event. This theory helps us to make informed predictions and decisions under uncertainty.
Statistical Events
In probability and statistics, statistical events are outcomes or sets of outcomes from a chance experiment. These events could be simple, like the event of a coin toss resulting in 'heads,' or compound, involving combinations of simple events, such as selecting a customer who bought a blue car and also purchased an SUV at the car dealership. It's important to understand that events are the building blocks of probability calculations.

When confronted with statistical events, we analyze their nature to determine probabilities. For example, mutually exclusive events have no overlap, and their probabilities simply add up. On the other hand, for non-mutually exclusive events, such as those highlighted in the car dealership example, we must account for the overlap in probabilities and adjust our calculations accordingly.

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Most popular questions from this chapter

"N.Y. Lottery Numbers Come Up \(9-1-1\) on \(9 / 11\) " was the headline of an article that appeared in the San Francisco Chronicle (September 13,2002 ). More than 5,600 people had selected the sequence \(9-1-1\) on that date, many more than is typical for that sequence. A professor at the University of Buffalo was quoted as saying, "I'm a bit surprised, but I wouldn't characterize it as bizarre. It's randomness. Every number has the same chance of coming up. People tend to read into these things. I'm sure that whatever numbers come up tonight, they will have some special meaning to someone, somewhere." The New York state lottery uses balls numbered \(0-9\) circulating in three separate bins. One ball is chosen at random from each bin. What is the probability that the sequence \(9-1-1\) would be selected on any particular day?

In a small city, approximately \(15 \%\) of those eligible are called for jury duty in any one calendar year. People are selected for jury duty at random from those eligible, and the same individual cannot be called more than once in the same year. What is the probability that an eligible person in this city is selected in both of the next 2 years? All of the next 3 years?

A small college has 2,700 students enrolled. Consider the chance experiment of selecting a student at random. For each of the following pairs of events, indicate whether or not you think they are mutually exclusive and explain your reasoning. a. the event that the selected student is a senior and the event that the selected student is majoring in computer science. b. the event that the selected student is female and the event that the selected student is majoring in computer science. c. the event that the selected student's college residence is more than 10 miles from campus and the event that the selected student lives in a college dormitory. d. the event that the selected student is female and the event that the selected student is on the college football team.

If you were to roll a fair die 1,000 times, about how many sixes do you think you would observe? What is the probability of observing a six when a fair die is rolled?

Six people hope to be selected as a contestant on a TV game show. Two of these people are younger than 25 years old. Two of these six will be chosen at random to be on the show. a. What is the sample space for the chance experiment of selecting two of these people at random? (Hint: You can think of the people as being labeled \(\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}, \mathrm{E},\) and \(\mathrm{F}\). One possible selection of two people is \(\mathrm{A}\) and \(\mathrm{B}\). There are 14 other possible selections to consider.) b. Are the outcomes in the sample space equally likely? c. What is the probability that both the chosen contestants are younger than \(25 ?\) d. What is the probability that both the chosen contestants are not younger than \(25 ?\) e. What is the probability that one is younger than 25 and the other is not?

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