WGU D772 OA COMPREHENSIVE
QUESTIONS AND SOLUTIONS UPDATED
STUDY RESOURCE
◉ Sample (Example)
Answer: A group of 500 high school students from different states
across the U.S.
◉ Population
Answer: The entire group of individuals or objects that you want
to study.
◉ Population (Example)
Answer: All high school students in the United States.
◉ What is a parameter in statistics?
Answer: A numerical value describing an entire population's
characteristics.
◉ Is a parameter a fixed value?
Answer: Yes, a parameter is a fixed value.
,◉ Why is a parameter often unknown?
Answer: Because collecting data from every member of a large
population is usually impractical or impossible.
◉ What is a statistic?
Answer: A numerical value that describes a characteristic of a
sample.
◉ How is a statistic calculated?
Answer: It is calculated from the data collected from the sample.
◉ What is the purpose of using statistics?
Answer: To estimate the corresponding population parameter.
◉ Statistic (Example)
Answer: The average height of 100 adult women randomly
selected from the United States.
◉ Parameter (Example)
Answer: The average height of all adult women in the United
States.
◉ Basic elements that make up a dataset
Answer: individuals, variables, and data.
, ◉ Individuals
Answer: are the objects described by a set of data. people,
animals, or things. What we collect information on.
◉ Variables
Answer: are the characteristics or measurements that we are
interested in studying. Specific aspects of the individuals that we
collect data on. Can be either quantitative (numerical) or
categorical (qualitative-Fav color, gender, job).
◉ Data
Answer: are the actual values of the variables
◉ The ____ is the 100 first-year students who were randomly
surveyed.
The ____ is a group of students who graduated from the university
last year, randomly selected
Answer: Sample
◉ The ____ is all first-year students attending Strime University
this term.
The ____ is a group of all students who graduated from the
university last year.
Answer: Population
QUESTIONS AND SOLUTIONS UPDATED
STUDY RESOURCE
◉ Sample (Example)
Answer: A group of 500 high school students from different states
across the U.S.
◉ Population
Answer: The entire group of individuals or objects that you want
to study.
◉ Population (Example)
Answer: All high school students in the United States.
◉ What is a parameter in statistics?
Answer: A numerical value describing an entire population's
characteristics.
◉ Is a parameter a fixed value?
Answer: Yes, a parameter is a fixed value.
,◉ Why is a parameter often unknown?
Answer: Because collecting data from every member of a large
population is usually impractical or impossible.
◉ What is a statistic?
Answer: A numerical value that describes a characteristic of a
sample.
◉ How is a statistic calculated?
Answer: It is calculated from the data collected from the sample.
◉ What is the purpose of using statistics?
Answer: To estimate the corresponding population parameter.
◉ Statistic (Example)
Answer: The average height of 100 adult women randomly
selected from the United States.
◉ Parameter (Example)
Answer: The average height of all adult women in the United
States.
◉ Basic elements that make up a dataset
Answer: individuals, variables, and data.
, ◉ Individuals
Answer: are the objects described by a set of data. people,
animals, or things. What we collect information on.
◉ Variables
Answer: are the characteristics or measurements that we are
interested in studying. Specific aspects of the individuals that we
collect data on. Can be either quantitative (numerical) or
categorical (qualitative-Fav color, gender, job).
◉ Data
Answer: are the actual values of the variables
◉ The ____ is the 100 first-year students who were randomly
surveyed.
The ____ is a group of students who graduated from the university
last year, randomly selected
Answer: Sample
◉ The ____ is all first-year students attending Strime University
this term.
The ____ is a group of all students who graduated from the
university last year.
Answer: Population
