Answer:
Caleb is saying that his research used concrete and verifiable evidence.
Explanation:
Empirical research is any study in which conclusions are drawn strictly from concrete and verifiable empirical evidence. This evidence can be collected using quantitative market studies and qualitative market research methods.
For example, research is done to see if listening to happy music while working can promote creativity. For this, an experiment is performed with a group of spectators who are exposed to happy music and another group who are not listening to music and then the topics are observed. The results derived from such research will provide empirical evidence of whether happy music promotes creativity or not.
