What criterion must be met for true comparability?

Comparative Data
Resource: Ch. 14 of Health Care Finance: Basic Tools for Nonfinancial Managers (3rd ed.)
Complete the following table by writing responses to the questions. Cite the sources in the text and list them at the bottom of the table.
What criterion must be met for true comparability?
What elements of consistency should be considered? Provide an example.
What is the manager’s responsibility in comparing data?
What are the four common uses of comparative data?
What do standardized data mean?