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Given the information in the following tables: Online transactions:
In-store transactions:
Which of the following describes merging these tables to create a master file that includes all transactions for both online and in-store sales?
Answer: D
Given the image below:
The data should be cleaned because of the presence of:
Answer: C
Several analysts are working simultaneously to compile a company’s annual report and meet a tight deadline. Since each analyst is making changes, the analysts are concerned that they are not always working on the most up-to-date report, which results in rework. Which of the following should be included in the report to prevent this from happening in the future?
Answer: A
Data was previously stored in the following relational tables:
A database architect changes the relational database structure to include an additional lookup table, which includes the following:
Which of the following MDM issues does this change in structure solve?
Answer: A
Which of the following BEST describes the difference between discrete and continuous values?
Answer: D
A survey asks participants to rate a company on a scale of one to ten. Which of the following BEST describes the rating variable?
Answer: B
Which of the following would be considered non-personally identifiable information?
Answer: A
A. Non-personally identifiable information (NPI) is information that cannot be used to identify an individual. In this case, the cell phone device name would be considered NPI because it is not tied to a specific individual. The other options (customer's name, government ID number, and telephone number) are all personally identifiable information (PII) because they can be used to identify an individual. PII includes any information that can be used to distinguish or trace an individual's identity, either alone or when combined with other information that is linked or linkable to a specific individual.
Source: Adapted from community discussion — CineFeX
A director who is responsible for reporting performance to executives has requested a dashboard for C-suite users who are not satisfied with the current multipage printed reports. The requirements for the dashboard are extensive and include displaying almost all the available data. An analyst is concerned that what is being requested will overwhelm users and result in an unused dashboard. Which of the following is the FIRST step the analyst should take?
Answer: A
Which of the following statistical methods can be used to measure changes over time?
Answer: C
A feature can take certain values (A, B, C, D, E, and F) and represents a grade of students from a college. Which of the following variables does this describe?
Answer: B
Ordinal variables represent categories with a natural order or ranking, but the intervals between the categories are not necessarily equal. In this case, the grades have a clear order or ranking (A > B > C > D > E > F), but the numerical difference between the grades may not be uniform or meaningful. So, the correct answer is: B. Ordinal variable
Source: Adapted from community discussion — Swift_and_Quick
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