A Professor of Economics Intends to Compare the Performances of First

Multiple Choice

A professor of economics intends to compare the performances of first year students at the four campuses of the university. In order to do so, she selects a random sample of 40 students from each campus. What is this type of sampling called?

A) Stratified random sampling.
B) Simple random sampling.
C) Cluster sampling.
D) None of these choices are correct.