In marketing, experimental research is defined as $\_\_\_\_\_\_\_\_.$

In marketing, experimental research is defined as $\_\_\_\_\_\_\_\_.$

Marketing research to gather preliminary information that will help define problems and suggest hypotheses.

The gathering of primary data by selecting matched groups of subjects, giving them different treatments, controlling related factors, and checking for differences in group responses.

Personal interviewing that involves inviting six to ten people to gather for a few hours with a trained interviewer to talk about a product, service, or organization.

A segment of the population selected for marketing research to represent the population as a whole.