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D467 WGU - EXPLORING DATA QUESTIONS AND ANSWERS
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D467 WGU - EXPLORING DATA QUESTIONS AND ANSWERS
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D467 WGU - EXPLORING DATA QUESTIONS ANDANSWERS
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 - Answers -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.
second-party
third-party
multi-party
first-party - Answers -first-party
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?
First-party
Multi-party
Third-party
Second-party - Answers -Second-party
In data analytics, what term refers to all possible data values in a dataset?
Source
Representation
Population
Sample - Answers -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.
Continuous
Discrete
Ordinal
Nominal - Answers -Discrete
Ordinal
,What type of data is the height of a skyscraper?
Discrete
Qualitative
Nominal
Continuous - Answers -Continuous
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 - Answers -Contains textual information
Sequence of characters and punctuation
In a data table, where are fields contained?
Rows
Columns
Favorites
Charts - Answers -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 - Answers -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 - Answers -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 - Answers -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.
An election poll only interviews people with college degrees. - Answers -A clinical study
includes three times more men than women.
A survey of students does not include homeschooled students.
An election poll only interviews people with college degrees.
What is the term for the tendency to search for or interpret information in a way that
validates pre-existing beliefs?
Sampling bias
Confirmation bias
Observer bias
Interpretation bias - Answers -Confirmation bias
Which of the following terms are also ways of describing observer bias? Select all that
apply.
Perception bias
Research bias
Spectator bias
Experimenter bias - Answers -Research bias
Spectator bias
Experimenter bias
Fill in the blank: Data is considered _____ when it is accurate, complete, and unbiased
information that has been vetted and proven fit for use.
original
current
comprehensive
reliable - Answers -reliable
Which of the following are usually good data sources? Select all that apply.
Vetted public datasets
Social media sites
Governmental agency data
Academic papers - Answers -Vetted public datasets
Governmental agency data
Academic papers
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