Final answer:
The objective of secondary-data research design is to analyze existing data from previously conducted research or organizational records to enhance understanding of a topic or to identify gaps in existing knowledge.
Step-by-step explanation:
A typical objective for secondary-data research design is to analyze existing data. This form of research does not involve collecting data firsthand from primary sources; instead, it involves the examination and analysis of data that has been previously gathered by other researchers or organizations. When conducting secondary data analysis in fields such as sociology, researchers may utilize various sources including academic works, periodicals, organizational records, and other historical documents to enrich their understanding of a topic or to identify gaps in existing knowledge.