# Fundamentals of Statistics

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## Test Yourself

 1 The portion of the population that is selected for analysis is called: sample frame parameter statistic 2 A summary measure that is computed from only a sample of the population is called: parameter population discrete variable statistic 3 The height of an individual is an example of a: discrete variable continuous variable categorical variable constant 4 The body style of an automobile (sedan, coupe, wagon, and so on) is an example of a: discrete variable continuous variable categorical variable constant 5 The number of credit cards in a person’s wallet is an example of a: discrete variable continuous variable categorical variable constant 6 Statistical inference occurs when you: compute descriptive statistics from a sample take a complete census of a population present a graph of data 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 _______. sample population statistic 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 _______. sample population statistic 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: statistical inference the scientific method sampling 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: inferential statistics descriptive statistics a parameter a statistic 11 A numerical measure that is computed to describe a characteristic of an entire population is called: a parameter a population a discrete variable 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? published sources experimentation surveying 13 Which of the following is a discrete variable? The favorite flavor of ice cream of students at your local elementary school The time it takes for a certain student to walk to your local elementary school The distance between the home of a certain student and the local elementary school The number of teachers employed at your local elementary school 14 Which of the following is a continuous variable? The eye color of children eating at a fast-food chain The number of employees of a branch of a fast-food chain The temperature at which a hamburger is cooked at a branch of a fast-food chain The number of hamburgers sold in a day at a branch of a fast-food chain 15 The number of cars that arrive per hour at a parking lot is an example of: a categorical variable a discrete variable a continuous variable a statistic

Answer True or False:

 16 The possible responses to the question, “How long have you been living at your current residence?” are values from a continuous variable. 17 The possible responses to the question, “How many times in the past three months have you visited a museum?” are values from a discrete variable.

Fill in the blank:

 18 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. 19 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. 20 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. 21 A numerical measure that is computed from only a sample of the population is called a ______. 22 The portion of the population that is selected for analysis is called the ______. 23 A college admission application includes many variables. The number of advanced placement courses the student has taken is an example of a ______ variable. 24 A college admission application includes many variables. The gender of the student is an example of a ______ variable. 25 A college admission application includes many variables. The distance from the student’s home to the college is an example of a ______ variable.