Fundamentals of Statistics

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This chapter is from the book

Test Yourself

1. The portion of the population that is selected for analysis is called:

1. a sample
2. a frame
3. a parameter
4. a statistic
2. A summary measure that is computed from only a sample of the population is called:

1. a parameter
2. a population
3. a discrete variable
4. a statistic
3. The height of an individual is an example of a:

1. discrete variable
2. continuous variable
3. categorical variable
4. constant
4. The body style of an automobile (sedan, minivan, SUV, and so on) is an example of a:

1. discrete variable
2. continuous variable
3. categorical variable
4. constant
5. The number of credit cards in a person’s wallet is an example of a:

1. discrete variable
2. continuous variable
3. categorical variable
4. constant
6. Statistical inference occurs when you:

1. compute descriptive statistics from a sample
2. take a complete census of a population
3. present a graph of data
4. take the results of a sample and reach conclusions about a population
7. The human resources director of a large corporation wants to develop a dental benefits package and decides to select 100 employees from a list of all 5,000 workers in order to study their preferences for the various components of a potential package. All the employees in the corporation constitute the _______.

1. sample
2. population
3. statistic
4. parameter
8. The human resources director of a large corporation wants to develop a dental benefits package and decides to select 100 employees from a list of all 5,000 workers in order to study their preferences for the various components of a potential package. The 100 employees who will participate in this study constitute the _______.

1. sample
2. population
3. statistic
4. parameter
9. Those methods that involve collecting, presenting, and computing characteristics of a set of data in order to properly describe the various features of the data are called:

1. statistical inference
2. the scientific method
3. sampling
4. descriptive statistics
10. Based on the results of a poll of 500 registered voters, the conclusion that the Democratic candidate for U.S. president will win the upcoming election is an example of:

1. inferential statistics
2. descriptive statistics
3. a parameter
4. a statistic
11. A numerical measure that is computed to describe a characteristic of an entire population is called:

1. a parameter
2. a population
3. a discrete variable
4. a statistic
12. You were working on a project to examine the value of the American dollar as compared to the English pound. You accessed an Internet site where you obtained this information for the past 50 years. Which method of data collection were you using?

1. published sources
2. experimentation
3. surveying
13. Which of the following is a discrete variable?

1. The favorite flavor of ice cream of students at your local elementary school
2. The time it takes for a certain student to walk to your local elementary school
3. The distance between the home of a certain student and the local elementary school
4. The number of teachers employed at your local elementary school
14. Which of the following is a continuous variable?

1. The eye color of children eating at a fast-food chain
2. The number of employees of a branch of a fast-food chain
3. The temperature at which a hamburger is cooked at a branch of a fast-food chain
4. The number of hamburgers sold in a day at a branch of a fast-food chain
15. The number of cell phones in a household is an example of:

1. a categorical variable
2. a discrete variable
3. a continuous variable
4. a statistic

1. The possible responses to the question, “How long have you been living at your current residence?” are values from a continuous variable.
2. The possible responses to the question, “How many times in the past seven days have you streamed a movie or TV show online?” are values from a discrete variable.

Fill in the blank:

1. An insurance company evaluates many variables about a person before deciding on an appropriate rate for automobile insurance. The number of accidents a person has had in the past three years is an example of a _______ variable.
2. An insurance company evaluates many variables about a person before deciding on an appropriate rate for automobile insurance. The distance a person drives in a day is an example of a _______ variable.
3. An insurance company evaluates many variables about a person before deciding on an appropriate rate for automobile insurance. A person’s marital status is an example of a _______ variable.
4. A numerical measure that is computed from only a sample of the population is called a ______.
5. The portion of the population that is selected for analysis is called the ______.
6. A college admission application includes many variables. The number of advanced placement courses the student has taken is an example of a ______ variable.
7. A college admission application includes many variables. The gender of the student is an example of a ______ variable.
8. A college admission application includes many variables. The distance from the student’s home to the college is an example of a ______ variable.