21. Data transformation can change the structure of the data. An example of this is taking data stored in one format and converting it to another.
- True
- False
22. Which of the following is a benefit of internal data?
- Internal data is less vulnerable to biased collection.
- Internal data is the only data relevant to the problem.
- Internal data is less likely to need cleaning.
- Internal data is more reliable and easier to collect.
23. Which of the following is an example of structured data?
- Audio file
- Relational database
- Video file
- Digital photo
24. The following is a selection from a spreadsheet:
What kind of data format does it contain?
- Wide
- Short
- Long
- Narrow
