D467 - Exploring Data Practice Questions and Correct Answers
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Course
WGU D467
Institution
WGU D467
What are cookies?
Types of malware that can damage computers Small files stored on computers that contain information about users Programs that enable users to access websites Pieces of code that store information about a website Small files stored on computers that contain information about users...
D467 - Exploring Data Practice
Questions and Correct Answers
What are cookies?
Types of malware that can damage computers
Small files stored on computers that contain information about users
Programs that enable users to access websites
Pieces of code that store information about a website ✅Small files stored on
computers that contain information about users
Fill in the blank: For data analytics projects, _____ data is typically preferred because
users know it originated within the organization.
A grocery store chain purchases customer data from a credit card company. The grocer
uses this data to identify its most loyal customers and offer them special promotions and
discounts. What type of data is being used in this scenario?
In data analytics, what term refers to all possible data values in a dataset?
Source
Representation
Population
Sample ✅Population
An entertainment website displays a star rating for a movie based on user reviews.
Users can select from one to five whole stars to rate the movie. The star rating is an
example of what type of data? Select all that apply.
In data analytics, what is the term for data that is generated from, and lives, outside of
an organization?
Peripheral
Outer
Internal
External ✅External
What are the key characteristics of unstructured data? Select all that apply.
Fits neatly into rows and columns
Unorganized
May have an internal structure
Clearly identifiable construction ✅Unorganized
May have an internal structure
Fill in the blank: A data model is used to organize _____ and how they relate to one
another.
data visualizations
database structures
data elements
spreadsheet fields ✅data elements
When discussing structured databases, data analysts refer to the data contained in a
row as a record. How do they refer to the data contained in a column?
Field
Subject
Character
Point ✅Field
Fill in the blank: A data type is a specific kind of data _____ that tells what kind of value
the data is.
attribute
frame
model
, point ✅attribute
What are the key characteristics of a text, or string, data type? Select all that apply.
Contains textual information
Only two possible values
Sequence of characters and punctuation
Has numerical percentages ✅Contains textual information
Sequence of characters and punctuation
In a data table, where are fields contained?
Rows
Columns
Favorites
Charts ✅Columns
When using long data, each subject has data in multiple rows. This is because each row
represents what?
Data in different formats
True or false data points
One observation per subject
Multiple values ✅One observation per subject
What strategy do data professionals use in order to ensure unbiased sampling?
Use random sampling during data collection
Write survey questions that encourage specific responses
Store data in a spreadsheet
Skew results in a certain direction ✅Use random sampling during data collection
Fill in the blank: Bias is a _____ preference in favor of or against a person, group of
people, or thing.
conscious or subconscious
sensible or insensible
fair or unfair
standard or substandard ✅conscious or subconscious
Which of the following are examples of sampling bias? Select all that apply.
A teacher gives higher grades to essays written in their own writing style.
A clinical study includes three times more men than women.
A survey of students does not include homeschooled students.
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