Ricardo Wants to Study the Academic Performance of Graduate Students

Multiple Choice

Ricardo wants to study the academic performance of graduate students in the U.S. First, he decides that he will study schools in only 15 states and randomly selects those states. He then randomly selects 30 schools from these 15 states. Over a period of 3 months, Ricardo travels to these 30 schools and studies the academic performance of their students. Identify the sampling technique used by Ricardo in this scenario.

A) Cluster sampling
B) Quota sampling
C) Haphazard sampling
D) Purposive sampling