Please describe what kinds of sampling designs would be used for the following?

1. A research study to get a fast idea of the appropriateness of a new vaccine which cannot be

allotted over the counter without prescription.

2. A research study involving a sample of 325 students in a university where 2,000 students

are enrolled.

3. An exploration of the career prominence of professionals in the fields of business,

engineering, and law.

4. The generalizability of the attitudes of blue-collar workers from a sample of 184, to the

total population of 350 blue collar workers in the entire factory of a particular company.