What is the function of the ID statement in PROC PRINT?

The ID statement in PROC PRINT is specifically designed to display the values of specified variables in place of the default observation numbers that are typically shown in the output. When you include an ID statement, it enhances the readability of the report by allowing users to see relevant variable values, aiding in identifying each observation.

For example, if you have a dataset of customer information, using an ID statement could allow you to print customer IDs or names in the output instead of just numbered rows. This is particularly useful when the objective is to make the output more informative and user-friendly, as it allows easy identification and comparison of the data presented.

In contrast, other options focus on different functionalities of PROC PRINT, such as sorting or grouping, which are not the purpose of the ID statement. The ID statement's unique role is to enhance the output presentation by highlighting specific variable values related to each observation.