WGU D772 Data Literacy Explained: Master Statistics
with Confidence
Sample
A smaller, more manageable group selected from the population to represent the larger group.
Sample (Example)
A group of 500 high school students from different states across the U.S.
Population
The entire group of individuals or objects that you want to study.
Population (Example)
All high school students in the United States.
What is a parameter in statistics?
A numerical value describing an entire population's characteristics.
Is a parameter a fixed value?
Yes, a parameter is a fixed value.
Why is a parameter often unknown?
Because collecting data from every member of a large population is usually impractical or impossible.
What is a statistic?
A numerical value that describes a characteristic of a sample.
How is a statistic calculated?
It is calculated from the data collected from the sample.
What is the purpose of using statistics?
To estimate the corresponding population parameter.
Statistic (Example)
The average height of 100 adult women randomly selected from the United States.
, Parameter (Example)
The average height of all adult women in the United States.
Basic elements that make up a dataset
individuals, variables, and data.
Individuals
are the objects described by a set of data. people, animals, or things. What we collect information on.
Variables
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
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
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.
Population
The ____ is the average (mean) amount of money spent (excluding books) by first-year university
students in the sample.
The ____ is the average cumulative GPA of students in the study who graduated from the university
last year.
Statistic
The ____ could be the amount of money spent (excluding books) by one first-year student.
The ____ is the cumulative GPA of one student who graduated from the university last year.
Variable
The ____ are the dollar amounts spent by the first-year students.
The ____ consists of the values 3.65, 2.80, 1.50, 3.90.
Data
The ____ is the average (mean) amount of money spent (excluding books) by first-year university
students at Strime University this term.
The ____ is the average cumulative GPA of students who graduated from the university last year.
Parameter
with Confidence
Sample
A smaller, more manageable group selected from the population to represent the larger group.
Sample (Example)
A group of 500 high school students from different states across the U.S.
Population
The entire group of individuals or objects that you want to study.
Population (Example)
All high school students in the United States.
What is a parameter in statistics?
A numerical value describing an entire population's characteristics.
Is a parameter a fixed value?
Yes, a parameter is a fixed value.
Why is a parameter often unknown?
Because collecting data from every member of a large population is usually impractical or impossible.
What is a statistic?
A numerical value that describes a characteristic of a sample.
How is a statistic calculated?
It is calculated from the data collected from the sample.
What is the purpose of using statistics?
To estimate the corresponding population parameter.
Statistic (Example)
The average height of 100 adult women randomly selected from the United States.
, Parameter (Example)
The average height of all adult women in the United States.
Basic elements that make up a dataset
individuals, variables, and data.
Individuals
are the objects described by a set of data. people, animals, or things. What we collect information on.
Variables
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
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
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.
Population
The ____ is the average (mean) amount of money spent (excluding books) by first-year university
students in the sample.
The ____ is the average cumulative GPA of students in the study who graduated from the university
last year.
Statistic
The ____ could be the amount of money spent (excluding books) by one first-year student.
The ____ is the cumulative GPA of one student who graduated from the university last year.
Variable
The ____ are the dollar amounts spent by the first-year students.
The ____ consists of the values 3.65, 2.80, 1.50, 3.90.
Data
The ____ is the average (mean) amount of money spent (excluding books) by first-year university
students at Strime University this term.
The ____ is the average cumulative GPA of students who graduated from the university last year.
Parameter
