Question 1

Identify cases, variables and any units.
-A few of the variables for which data were collected in the Pew Internet & Life
Project study about online shopping include age, gender, income, and number of hours
Spent shopping online per month. Which of the variables is categorical?

Accepted Answer

Gender is categorical as it represents a non-numerical characteristic of the individual, whereas the other variables are quantitative.

Question 2

Identify cases, variables and any units.
-A popular travel magazine regularly reviews hotels worldwide. In a recent issue, it
Focused on hotels in Hawaii. Among the variables for which it provided data was the
Price range for rooms with an ocean view. Which of the following statements is true?

Accepted Answer

The variable "price range for rooms with an ocean view" is quantitative because it represents a numerical value, and the units are dollars ($).

Question 3

Provide context for data.
-What is the "Who" in a Consumer Reports Health study on the effectiveness and
Safety of drugs used to treat arthritis?

Accepted Answer

The "Who" in a study refers to the subjects or entities being studied. In this case, it is the drugs to treat arthritis currently on the market.

Question 4

Identify cases, variables and any units.
-A university is interested in gauging student satisfaction in its online MBA program.
A survey is designed and administered via the Internet to a sample of students currently
Active in the program. Which of the following would best describe the cases?

Accepted Answer

The cases in this scenario would be the students currently active in the online MBA program who respond to the survey, thus making them respondents. The variables would be the factors being measured in the survey, such as overall satisfaction, ease of use of the online platform, quality of instruction, etc. There are no experimental units or subjects involved in this scenario. No units were mentioned either.

Question 5

Create p-charts.
-List the variables reported in the Consumer Reports Health article on drugs used to
treat arthritis. If the variable is quantitative, give the units. If the variable is categorical,
indicate whether it is nominal or ordinal.

Accepted Answer

The answer of Create p-charts.
-List the variables reported in the...

Question 6

Create p-charts.
-The Human Resources Department of a large corporation maintains records on its
employees. The table displays some of these data. List the variables in the data set.
Indicate whether each variable is categorical or quantitative. If the variable is
quantitative, give the units. If the variable is categorical, indicate whether it is nominal or
ordinal.

Accepted Answer

The answer of Create p-charts.
-The Human Resources Department of a...

Question 7

Identify cases, variables and any units.
-A Consumer Reports Health study on arthritis drugs takes into consideration cost.
Cost is

Accepted Answer

Cost is a quantitative variable since it can be measured and represented with a numerical value. There may be units associated with the cost such as dollars or euros. However, the question does not specify any specific units.

Question 8

Identify cases, variables and any units.
-A Consumer Reports Health study on the effectiveness and safety of arthritis drugs
Collected data on possible side effects. This is what kind of variable?

Accepted Answer

The variable "possible side effects" is categorical because it describes categories of outcomes. It is also nominal because the categories do not have a natural order.

Question 9

Identify data sources.
-A locally owned spa, Alexander's, is interested in adding a tea room that not only
Offers specialty teas but an organic lunch menu. In order to determine how many of its
Regular customers would be interested in such an addition, Alexander's sent out a short e-
Mail questionnaire. The source of these data is

Accepted Answer

The data source is a designed survey because Alexander's sent out a questionnaire specifically to gather information from its regular customers about their interest in the new tea room and lunch menu.

Question 10

Identify time series and cross sections.
-A mid-priced chain of hotels, Hometown Suites, collects data on monthly occupancy
Rates for forecasting and planning purposes. These data are

Accepted Answer

Time series data are collected over time, and the data on monthly occupancy rates for Hometown Suites is collected over time, so it is a time series.

Question 11

Identify cases, variables and any units.
-A popular travel magazine regularly reviews hotels worldwide. In a recent issue, it
Focused on hotels in Hawaii. Among the variables for which it provided data was
Whether or not the hotel included a spa. This is a

Accepted Answer

The variable "whether or not the hotel included a spa" is a categorical variable because it classifies hotels into categories (with spa or without spa) without implying any order or numerical value.

Question 12

Identify time series and cross sections.
-Which of the following is (are) based on cross sectional data?

Accepted Answer

Percentage of American adults who work full time is based on cross sectional data, as it measures a specific point in time across a group of individuals (i.e. the current percentage of American adults who work full time). The other options are all based on time series data, as they track changes over time (i.e. company profits over quarters, historical stock prices).

Question 13

Identify cases, variables and any units.
-In a survey undertaken by a university to gauge student satisfaction in its online MBA
Program, one question asked students to indicate the number of credits they had
Transferred into the program. Which of the following is true?

Accepted Answer

The number of credits transferred is a quantitative variable because it represents a measurable quantity.

Question 14

Provide context for data.
-Consumer Reports Health routinely compares drugs in terms of effectiveness and
Safety. In summer 2008 they reviewed drugs used to treat arthritis. Among the
Information reported was convenience of use (how many pills required each day) and
Possible side effects (e.g., dizziness, stomach upset). Convenience of use and possible
Side effects constitute the ________ of the study.

Accepted Answer

The "What" of a study refers to the variables or factors being measured or observed, which in this case are the convenience of use and possible side effects of the drugs.

Question 15

Identify cases, variables and any units.
-The Human Resources Department of a large corporation maintains records on its
Employees. Data are maintained of the following variables: Age, Employment Category,
Education, Whether or not the employee participates in a wellness program, and
Paycheck benefit deductions. Which of these variables are categorical?

Accepted Answer

The answer of Identify cases, variables and any units.
-The Human...

Question 16

Provide context for data.
-In the fall of 2007, the Pew Internet & Life Project conducted telephone interviews
With a sample of American adults aged 18 and older about online shopping. American
Adults aged 18 and older constitute the ______ of the study.

Accepted Answer

The "who" of a study refers to the subjects or participants involved, which in this case are American adults aged 18 and older.

Question 17

Identify cases, variables and any units.
-The Pew Internet & Life Project study about online shopping asked respondents to
Indicate their education level on the following scale: Less than High School, High
School, Some College, College +. Which of the following statements is (are) true?

Accepted Answer

Education level is a categorical variable because it describes a characteristic or quality. It is ordinal scaled because the categories have a meaningful order (Less than High School < High School < Some College < College +).

Question 18

Identify time series and cross sections.
-Which of the following is (are) time series data?

Accepted Answer

All of the options given involve observations taken over time, making them time series data.

Question 19

Identify cases, variables and any units.
-Researchers in e-commerce design an experiment to determine what factors are most
Important to online consumers when completing a transaction via the Internet.
Individuals perform tasks on a set of Web sites and record their impressions about
Various attributes. Which of the following would best describe the cases?

Accepted Answer

The cases in this context are the participants, as they are the individuals whose responses and behaviors are being studied in the experiment.

Question 20

Identify time series and cross sections.
-A locally owned spa, Alexander's, is interested in adding a tea room that not only
Offers specialty teas but an organic lunch menu. In order to determine how many of its
Regular customers would be interested in such an addition, Alexander's sent out a short e-
Mail questionnaire. One question asked its customers to indicate how much they spend
Monthly on all natural, organic products. These data are

Accepted Answer

The data collected from the questionnaire represents a snapshot of different customers' spending at a single point in time, making it cross-sectional data.

Quiz 2: Data

Identify cases, variables and any units. -A few of the variables for which data were collected in the Pew Internet & Life Project study about online shopping include age, gender, income, and number of hours Spent shopping online per month. Which of the variables is categorical?

Identify cases, variables and any units. -A popular travel magazine regularly reviews hotels worldwide. In a recent issue, it Focused on hotels in Hawaii. Among the variables for which it provided data was the Price range for rooms with an ocean view. Which of the following statements is true?

Provide context for data. -What is the "Who" in a Consumer Reports Health study on the effectiveness and Safety of drugs used to treat arthritis?

Identify cases, variables and any units. -A university is interested in gauging student satisfaction in its online MBA program. A survey is designed and administered via the Internet to a sample of students currently Active in the program. Which of the following would best describe the cases?

Create p-charts. -List the variables reported in the Consumer Reports Health article on drugs used to treat arthritis. If the variable is quantitative, give the units. If the variable is categorical, indicate whether it is nominal or ordinal.

Identify cases, variables and any units. -A Consumer Reports Health study on arthritis drugs takes into consideration cost. Cost is

Identify cases, variables and any units. -A Consumer Reports Health study on the effectiveness and safety of arthritis drugs Collected data on possible side effects. This is what kind of variable?

Identify time series and cross sections. -A mid-priced chain of hotels, Hometown Suites, collects data on monthly occupancy Rates for forecasting and planning purposes. These data are

Identify cases, variables and any units. -A popular travel magazine regularly reviews hotels worldwide. In a recent issue, it Focused on hotels in Hawaii. Among the variables for which it provided data was Whether or not the hotel included a spa. This is a

Identify time series and cross sections. -Which of the following is (are) based on cross sectional data?

Identify cases, variables and any units. -In a survey undertaken by a university to gauge student satisfaction in its online MBA Program, one question asked students to indicate the number of credits they had Transferred into the program. Which of the following is true?

Provide context for data. -In the fall of 2007, the Pew Internet & Life Project conducted telephone interviews With a sample of American adults aged 18 and older about online shopping. American Adults aged 18 and older constitute the ______ of the study.

Identify cases, variables and any units. -The Pew Internet & Life Project study about online shopping asked respondents to Indicate their education level on the following scale: Less than High School, High School, Some College, College +. Which of the following statements is (are) true?

Identify time series and cross sections. -Which of the following is (are) time series data?