In a sample of professors on a university campus, the researcher randomly selects 5 academic departments, and then interviews each professor in those selected departments. What type of sampling scheme is this?
(A) convenience sample
(B) cluster sample
(C) stratified random sample
(D) simple random sample
Answer: (B) cluster sample
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.