To create only one observation per person in the provided DATA step, what statement should be added?

To ensure that only one observation per person is created in the DATA step, integrating a conditional statement that specifies only to output records where the type equals 'P' serves the purpose effectively. By doing so, the program will selectively filter and include just those records that match this condition.

This is particularly useful when dealing with datasets that might include multiple types of records for each individual. If each person has several entries with varying types, restricting the output to only those that meet this criterion ensures that only relevant data is retained. Consequently, this enhances the clarity and utility of the dataset for analysis and reporting purposes.

If the focus were instead on a different condition, such as only including records where type equals 'H', that could lead to situations where relevant observations are missed, depending on the dataset's structure and the context of the analysis. Therefore, the choice of filtering specifically for type 'P' aligns with the goal of consolidating records to one observation per person effectively.