D467 WGU EXPLORING DATA Test> 152-question diagnostic test and answer key (all correct updated .)
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Course
WGU D467
Institution
WGU D467
1. To track people's online activities and interests, which method of data collection is most
effective?: Cookies
2. What are cookies?: Small files stored on computers that contain information about users
3. Fill in the blank: For data analytics projects, data istypically preferred
because us...
1. To track people's online activities and interests, which method of data collection is most
effective?: Cookies
2. What are cookies?: Small files stored on computers that contain information about users
3. Fill in the blank: For data analytics projects, data is typically preferred
because users know it originated within the organization.: first-party
4. In data analytics, what term refers to all possible data values in a dataset?-
: Population
5. 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?: Second-party
6. What type of data is the height of a skyscraper?: Continuous
7. In data analytics, what is the term for data that is generated from, and lives, outside of an:
External
8. Fill in the blank: A data model is used to organize and how they relate to
one another.: data elements
9. 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
10. Fill in the blank: A data type is a specific kind of data that tells what
kind of value the data is.: attribute
11. In a data table, where are fields contained?: Columns
12. When using long data, each subject has data in multiple rows. This is because each row
represents what?: One observation per subject
13. Fill in the blank: The number of stars awarded to a product review is an example of
data.: discrete
14. A data analyst works on an urgent traffic study. As a result of the short time frame, which type of
data might yield the best results?: Historical
15. A political scientist needs to poll all voters in Seoul, South Korea, in order to predict the outcome
of an election. Because it would be impossible to collect data from every single person in the city,
the political scientist polls
a part of the population that is representative of the whole. What does this scenario describe?: Using
a sample
16. A data scientist at a tech company records whether users have accepted their company's terms
of service or not. What data type is being collected in this scenario?: Boolean
, LATEST D467 WGU EXPLORING DATA EXAM
17. Which of the following questions would enable a data professional to collect nominal
qualitative data?: Did anyone recommend our music lessons to you?
18. Fill in the blank: Bias is a preference in favor of or against a person, group of
people, or thing.: conscious or subconscious
19. What is the term for the tendency to search for or interpret information in a way that validates
pre-existing beliefs?: Confirmation bias
20. Fill in the blank: Data is considered when it is accurate, complete, and
unbiased information that has been vetted and proven fit for use.: reliable
21. A junior data analyst learns that the dataset they have been given is six years old. After looking
into this further, they also discovered that the age of the data is making the information irrelevant
to their project. What good data source principle have they used to evaluate the dataset?: Current
22. What concept states that all data-processing activities and algorithms should be completely
explainable and understood by the individual who pro- vides their data?: Transaction transparency
23. A data analyst removes personally identifying information from a dataset. What task are they
performing?: Data anonymization
24. Before completing a survey, an individual acknowledges reading informa- tion about how and why
the data they provide will be used. What is this concept called?: Consent
25. What are data ethics?: Well-founded standards of right and wrong that dictate how data is
collected, shared, and used
26. Fill in the blank: Openness refers to access, usage, and sharing of data.:
free
27. What is the preferred method for open data to be made available?: A convenient and
modifiable internet download
28. Legal right to access your data is an element of which aspect of data ethics?: Privacy
29. A data team at a nature preserve researches the origin of a dataset to confirm it was created
by a reputable source, such as a nonprofit research institution. Which aspect of good data are
they prioritizing?: Cited
30. A manager in charge of selling a particular product interprets any ambigu- ous customer feedback
about the product as being positive. What type of bias does this represent?: Interpretation
31. Before completing a survey, a respondent learns more about how their data will be used. They
understand why their data is being collected and how long it will be stored. What data ethics concept
does this describe?: Consent
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