One of the biggest mistakes in marketing research is to:
1. Refine the problem definition.
2. Collect primary data before exhausting the information available from secondary sources.
3. Begin the search for primary data after all secondary data have been gathered.
4. Use a mail survey without first doing a focus group interviews.
5. Hire an outside agency to gather information
Answer: 2. Collect primary data before exhausting the information available from secondary sources.