WGU D467 Exploring Data Exam updated
actual questions and CORRECT answers
Data collection considerations - CORRECT ANSWER 1. Select the right data type 2.
Determine the time frame for data collection 3. How the data will be collected 4. How much
data to collect 5. Choose data sources 6. Decide what data to use
Population - CORRECT ANSWER All possible data values in a certain dataset
Sample - CORRECT ANSWER A part of the population that is representative of the
population
First-party data - CORRECT ANSWER Data collected by an individual or group using
their own resources
Second-party data - CORRECT ANSWER Data collected by a group directly from its
audience and then sold
Third-party data - CORRECT ANSWER Data collected from outside sources who did
not collect it directly
Internal data (Primary data) - CORRECT ANSWER Collected by a researcher from
first-hand sources
External data (Secondary data) - CORRECT ANSWER Gathered by other people or
from other research
Quantitative data - CORRECT ANSWER Can be measured and counted using numbers
(quantity, amount, range)
,Qualitative data - CORRECT ANSWER Cannot be counted, measured or easily
expressed in numbers (names, categories, descriptions)
Discrete data - CORRECT ANSWER Data that is counted and has a limited number of
values
Continuous data - CORRECT ANSWER Data that is measured and can have any
numeric value
Nominal data - CORRECT ANSWER A type of qualitative data that is categorized
without a set order
Ordinal data - CORRECT ANSWER A type of qualitative data with a set order or scale
Structured data - CORRECT ANSWER Data organized in a certain format such as
rows and columns
Unstructured data - CORRECT ANSWER Data that is not organized in an easily
identifiable manner
Data model - CORRECT ANSWER A model that is used for organizing data elements
and how they relate to one another
Data elements - CORRECT ANSWER Pieces of information, such as people's names,
account numbers, and addresses
Data modeling - CORRECT ANSWER The process of creating diagrams that visually
represent how data is organized and structured
Levels of data modeling - CORRECT ANSWER 1. Conceptual modeling 2. Logical
data modeling 3. Physical data modeling
, Physical data model - CORRECT ANSWER Defines all entities and attributes used.
Entity Relationship Diagram (ERD) - CORRECT ANSWER Visual way to understand
the relationship between entities in the data model.
Unified Modeling Language (UML) - CORRECT ANSWER Detailed diagrams that
describe the structure of a system by showing the system's entities, attributes, operations, and
their relationships.
Data type - CORRECT ANSWER A specific kind of data attribute that tells what kind
of value that is.
Text or string - CORRECT ANSWER A sequence of characters and punctuation that
contains textual information.
Boolean - CORRECT ANSWER Data type with only two possible values: true or false.
Operator - CORRECT ANSWER A symbol that names the operation or calculation to
be performed.
AND operator - CORRECT ANSWER Lets you stack both of your conditions.
OR operator - CORRECT ANSWER Lets you move forward if either one of your two
conditions is met.
NOT operator - CORRECT ANSWER Lets you filter by subtracting specific conditions
from the results.
Row - CORRECT ANSWER Record.
actual questions and CORRECT answers
Data collection considerations - CORRECT ANSWER 1. Select the right data type 2.
Determine the time frame for data collection 3. How the data will be collected 4. How much
data to collect 5. Choose data sources 6. Decide what data to use
Population - CORRECT ANSWER All possible data values in a certain dataset
Sample - CORRECT ANSWER A part of the population that is representative of the
population
First-party data - CORRECT ANSWER Data collected by an individual or group using
their own resources
Second-party data - CORRECT ANSWER Data collected by a group directly from its
audience and then sold
Third-party data - CORRECT ANSWER Data collected from outside sources who did
not collect it directly
Internal data (Primary data) - CORRECT ANSWER Collected by a researcher from
first-hand sources
External data (Secondary data) - CORRECT ANSWER Gathered by other people or
from other research
Quantitative data - CORRECT ANSWER Can be measured and counted using numbers
(quantity, amount, range)
,Qualitative data - CORRECT ANSWER Cannot be counted, measured or easily
expressed in numbers (names, categories, descriptions)
Discrete data - CORRECT ANSWER Data that is counted and has a limited number of
values
Continuous data - CORRECT ANSWER Data that is measured and can have any
numeric value
Nominal data - CORRECT ANSWER A type of qualitative data that is categorized
without a set order
Ordinal data - CORRECT ANSWER A type of qualitative data with a set order or scale
Structured data - CORRECT ANSWER Data organized in a certain format such as
rows and columns
Unstructured data - CORRECT ANSWER Data that is not organized in an easily
identifiable manner
Data model - CORRECT ANSWER A model that is used for organizing data elements
and how they relate to one another
Data elements - CORRECT ANSWER Pieces of information, such as people's names,
account numbers, and addresses
Data modeling - CORRECT ANSWER The process of creating diagrams that visually
represent how data is organized and structured
Levels of data modeling - CORRECT ANSWER 1. Conceptual modeling 2. Logical
data modeling 3. Physical data modeling
, Physical data model - CORRECT ANSWER Defines all entities and attributes used.
Entity Relationship Diagram (ERD) - CORRECT ANSWER Visual way to understand
the relationship between entities in the data model.
Unified Modeling Language (UML) - CORRECT ANSWER Detailed diagrams that
describe the structure of a system by showing the system's entities, attributes, operations, and
their relationships.
Data type - CORRECT ANSWER A specific kind of data attribute that tells what kind
of value that is.
Text or string - CORRECT ANSWER A sequence of characters and punctuation that
contains textual information.
Boolean - CORRECT ANSWER Data type with only two possible values: true or false.
Operator - CORRECT ANSWER A symbol that names the operation or calculation to
be performed.
AND operator - CORRECT ANSWER Lets you stack both of your conditions.
OR operator - CORRECT ANSWER Lets you move forward if either one of your two
conditions is met.
NOT operator - CORRECT ANSWER Lets you filter by subtracting specific conditions
from the results.
Row - CORRECT ANSWER Record.
