DATA
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,Question 1
How does an analyst ensure that a data source is reliable?
Correct Answer
It is accurate, complete, and unbiased information.
Question 2
When using long data, each subject has data in multiple rows. This is because each row represents what?
Correct Answer
One observation per subject
Question 3
Fill in the blank: Hypothesis testing is a process to determine whether a survey or _____ has meaningful results.
Correct Answer
experiment
Question 4
Fill in the blank: To keep a header row at the top of a spreadsheet, highlight the row and select _____ from the
View menu.
Correct Answer
freeze
Question 5
When using tokenization as a safety measure, what is replaced as a randomly generated token?
Correct Answer
The data elements to be protected
Question 6
Which process do data analysts use to make data more organized and easier to read?
Correct Answer
Data manipulation
Question 7
An analyst performing data cleansing on invoice data would like to select and view rows that have an amount paid
that is greater than $100. Which spreadsheet functionality should the analyst use?
Correct Answer
Filter
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, Question 8
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?
Correct Answer
Historical
Question 9
A data analyst suspects that there are some nulls in their spreadsheet. In order to identify those missing values,
they use a spreadsheet tool that changes how cells appear when values meet specific conditions. What tool do they
use?
Correct Answer
Conditional formatting
Question 10
A financial institution publishes data about stock prices and market trends, which any business, nonprofit, or citizen
can access, reuse, or redistribute through its online databases. What type of data is described in this scenario?
Correct Answer
Open
Question 11
A data analyst discovers that their database has recognized product price data as text strings. What SQL function
can the analyst use to convert the text strings to floats?
Correct Answer
cast
Question 12
Fill in the blank: Data _____ is a cleaning feature to check the accuracy and quality of data before adding or
importing it.
Correct Answer
validation
Question 13
Which tool is used by data analysts to store and organize data, making it easier for them to manage and access
information?
Correct Answer
Database
Question 14
What data-security measure uses a unique algorithm to alter data and make it inaccessible without the algorithm?
Correct Answer
Encryption
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