D467 WGU Exploring Data Practice Questions
with Verified Correct Answers
First Party Data
Data you collect yourself
Second Party Data
Data is collected directly by another group then sold
Third Party Data
Data sold by a provider that did not collect the data themselves
Data Collection Considerations
Select The Right Type of Data
Determine the Time Frame
Collect New Data
Use Existing Data
Data Formats
Primary Vs Secondary, Internal Vs. External, Continuous Vs. Discrete, Qualitative Vs.
Quantitative, Nominal Vs Ordinal, Structured Vs. Unstructured
Structured Data
Organized in a certain format such as rows and columns
Unstructured Data
Not Organized in any easy way to identify
Data Modeling
, Process of creating diagrams that visually represents how data is organized and structured.
These visual representations are called data models
Three most common types of data modeling
Conceptual Data Modeling, Logical Data Modeling, Physical Data Modeling
Data Type
A specific Kind of data attribute that tells what kind of value the data is
Data Type in a Spreadsheet
Can be a number, text/string, or a Boolean
Boolean Logic
Uses Multiple conditions such as: boolean operators (AND, OR, NOT)
Data transformation
Process of changing the data's format, structure, or values
Goals of Data Transformation
Organization, Compatibility, Migration, Merging, Enhancement, or Comparison
Biased Data
Can systematically skew results in a certain direction making them unreliable. As an analyst,
think about bias and fairness from the moment you start collecting data to time you present
your conclusion.
Sampling Bias
When a sample is not representative of the population as a whole. Unbiased sampling results
in a sample that is representative of the population being measured.
with Verified Correct Answers
First Party Data
Data you collect yourself
Second Party Data
Data is collected directly by another group then sold
Third Party Data
Data sold by a provider that did not collect the data themselves
Data Collection Considerations
Select The Right Type of Data
Determine the Time Frame
Collect New Data
Use Existing Data
Data Formats
Primary Vs Secondary, Internal Vs. External, Continuous Vs. Discrete, Qualitative Vs.
Quantitative, Nominal Vs Ordinal, Structured Vs. Unstructured
Structured Data
Organized in a certain format such as rows and columns
Unstructured Data
Not Organized in any easy way to identify
Data Modeling
, Process of creating diagrams that visually represents how data is organized and structured.
These visual representations are called data models
Three most common types of data modeling
Conceptual Data Modeling, Logical Data Modeling, Physical Data Modeling
Data Type
A specific Kind of data attribute that tells what kind of value the data is
Data Type in a Spreadsheet
Can be a number, text/string, or a Boolean
Boolean Logic
Uses Multiple conditions such as: boolean operators (AND, OR, NOT)
Data transformation
Process of changing the data's format, structure, or values
Goals of Data Transformation
Organization, Compatibility, Migration, Merging, Enhancement, or Comparison
Biased Data
Can systematically skew results in a certain direction making them unreliable. As an analyst,
think about bias and fairness from the moment you start collecting data to time you present
your conclusion.
Sampling Bias
When a sample is not representative of the population as a whole. Unbiased sampling results
in a sample that is representative of the population being measured.
