Final answer:
When developing a sample audience for interviews, selecting specific unit members is necessary in certain cases. This includes ensuring representativeness and accuracy, exploring diversity of perspectives, and engaging with experts or individuals with specialized knowledge.
Step-by-step explanation:
When developing your sample audience for interviews, it is necessary to select specific unit members rather than using a random sampling in cases where you want to ensure representativeness and accuracy. For example, if you are conducting interviews about a specific department in a company, selecting specific unit members would give you a better understanding of the dynamics and functions of that department.
Another scenario where selecting specific unit members is necessary is when you want to explore the diversity of perspectives within a particular group. Random sampling may not capture the full range of viewpoints, while selecting specific members can provide a more comprehensive understanding of the topic under investigation.
Lastly, specific unit members may need to be selected when conducting interviews with experts or individuals with specialized knowledge. For instance, if you are studying the impact of climate change on agriculture, selecting specific members who are agronomists or farmers would provide valuable insights.