Identifying Types of Sampling

For each if the situations described below, identify the type of sampling that is being used.

A. Simple random sampling	D. Purposive sampling
B. Stratified random sampling	E. Cluster sampling
C. Convenience sampling	F. No sampling – entire population is directly studied

1. _____	A researcher is interested in interviewing a group of New York City police officers. She goes to the main precinct in Manhattan and asks for volunteers to be interviewed, whom she then pays for the interviews.
2. _____	A researcher is interested in interviewing alumni of San Simeon College who graduated between the years 1990 and 1996. He gets the roster of the names of these individuals from the alumni office, and mails a questionnaire to everyone on the roster.
3. _____	Another researcher is also interested in interviewing alumni of San Simeon College who graduated between the years 1990 and 1996. He gets the roster of the names of these individuals from the alumni office, randomly selects the names of 100 individuals who graduated during these years, and then mails a questionnaire to everyone selected.
4. _____	A researcher is interested in identifying the attitudes of the physicians who work for Keyser hospital toward the Hillary Clinton plan for healthcare. She obtains a list of all Keyser Medical Centers in Southern California, and randomly selects ten of these Centers. Then she obtains a list of all physicians at these Centers and randomly selects eight physicians from each Center to interview.
5. _____	A graduate student enrolled in a Marriage and Family Counseling program at Daytona University is interested in determining how other graduate students feel about the program. He interviews all of the students he has access to on a given Monday night when he takes one of his counseling courses.
6. _____	A student enrolled in the Hotel and Restaurant school at Colorado State is researching the best restaurants in Denver based on the opinions of food critics. She begins by asking her advisor, who refers the student to four food critics who have written extensively on the subject and whom the student the contacts to interview for her study.