Question

Dr. Chang is conducting a research study of undergraduate students at her college. She wants to ensure an equal number of students from each grade level, so she uses the list of all students provided by the registrar’s office. From each list, she randomly selects 50 students from each group. What strategy of sampling is Dr. Chang using?

SELECT THE CORRECT ANSWER
Simple random sampling

Stratified sampling

Cluster sampling

Quota sampling

Accidental sampling

Answer 1

Dr. Chang is using **Stratified sampling**. In this method, she divides the population into distinct subgroups (in this case, the grade levels) and then randomly selects samples from each subgroup to ensure equal representation.