Test Bank all Chapters

Statistics Unlocking the Power of Data, 3e Robin Lock, Patti Frazer Lock, Kari Lock Morgan, Eric Lock, Dennis Lock

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1 Statistics - Unlocking the Power of Data, 3e (Lock) Chapter 1 Collecting Data

1.1 The Structure of Data

Use the following to answer the questions below:

A high school senior is collecting data on the colleges in which she is interested. Identify the variables as either categorical or quantitative.

1) Type of college: Private or Public college

Answer: Categorical

Diff: 1 Type: SA Var: 1

L.O.: 1.1.2

2) Tuition: in thousands of dollars

Answer: Quantitative

Diff: 1 Type: SA Var: 1

L.O.: 1.1.2

3) State: the state in which the college is located

Answer: Categorical

Diff: 1 Type: SA Var: 1

L.O.: 1.1.2

4) Zip Code: the zip code of the part of the country in which the college is located

Answer: Categorical

Diff: 2 Type: SA Var: 1

L.O.: 1.1.2

5) Enrollment: the number of students enrolled at the college

Answer: Quantitative

Diff: 1 Type: SA Var: 1

L.O.: 1.1.2

6) Student-Faculty Ratio: the number of students divided by the number of faculty

Answer: Quantitative

Diff: 1 Type: SA Var: 1

L.O.: 1.1.2

7) Graduation Rate: as a percentage

Answer: Quantitative

Diff: 1 Type: SA Var: 1

L.O.: 1.1.2

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2

Use the following to answer the questions below:

A high school senior is collecting data on the colleges in which she is interested, including the following variables: Type of college, Tuition, State, Enrollment, Student-Faculty Ratio, Graduation Rate

8) What are the cases in the high school senior's dataset?

• Colleges
• Tuition
• Graduation Rate
• State

Answer: A

Diff: 2 Type: BI Var: 1

L.O.: 1.1.1

9) Refer to the variables collected by the high school senior looking at colleges. Identify a question we might ask about any one of these individual variables.Answer: Answers will vary. Some possible answers include:

Type of college: Is she considering more private schools than public schools?

Tuition: What is the average tuition of the colleges she is considering? What is the "cheapest" school she is considering? What is the most expensive school she is considering?

State: Is there a state that she seems to prefer?

Enrollment: What is the average size of the colleges she is considering? What is the largest college she is considering? What is the largest college she is considering?Student-Faculty Ratio: What is the average SF ratio for the schools she is considering? What is the smallest SF ratio for the schools she is considering? What is the largest SF ratio for the schools she is considering?Graduation Rate: What is the average graduation rate for the schools she is considering? What is the lowest graduation rate for the schools she is considering? What is the highest graduation rate for the schools she is considering?Diff: 2 Type: ES Var: 1

L.O.: 1.1.4;1.1.5

10) Refer to the variables collected by the high school senior looking at colleges. Identify a question that we might ask about relationships between any two (or more) of these variables.Answer: Answers will vary. Some possible answers include: Which type of schools tend to cost more, the private or the public schools?Which type of schools tend to have the higher graduation rate, the private or public schools?Which type of schools tend to have the lower student-faculty ratio, the private or public schools?Which state is the most expensive?Can student-faculty ratio be used to predict tuition?Can graduation rate be used to predict tuition?Can enrollment be used to predict tuition?Diff: 2 Type: ES Var: 1

L.O.: 1.1.4;1.1.5

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3

Use the following to answer the questions below:

A realtor's website provides information on area homes that are for sale. Identify each of the variables as either categorical or quantitative.

11) List Price: amount, in thousands of dollars, for which the house is being sold

Answer: Quantitative

Diff: 1 Type: SA Var: 1

L.O.: 1.1.2

12) School District: the school district in which the home is located

Answer: Categorical

Diff: 1 Type: SA Var: 1

L.O.: 1.1.2

13) Size: in square feet

Answer: Quantitative

Diff: 1 Type: SA Var: 1

L.O.: 1.1.2

14) Style: the style of home (ranch, Cape Cod, Victorian, etc.)

Answer: Categorical

Diff: 1 Type: SA Var: 1

L.O.: 1.1.2

Use the following to answer the questions below:

A realtor's website provides information on area homes that are for sale, including the

following variables: List Price, School District, Size, Style.

15) What are the cases in the realtor's dataset?

• Individual houses
• List Price
• Size
• Style

Answer: A

Diff: 2 Type: BI Var: 1

L.O.: 1.1.1

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