The Dean of Students from a large university mailed a survey to 500 students selected at random. The sample was designed to include 125 students randomly selected from each of the freshman, sophomore, junior, and senior classes on campus. What sampling method was used?
A. Simple random sample
B. Systematic sample
C. Stratified random sample
D. Cluster sample
Analysis:
A. Incorrect. Stratified random sample was the sampling method used.
B. Incorrect. Stratified random sample was the sampling method used.
C. Correct. Stratified random sample was the sampling method used.
D. Incorrect. Stratified random sample was the sampling method used.
ANSWER : C
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