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?
A)simple random sampling
B)quota sampling
C)cluster sampling
D)stratified sampling
E)accidental sampling

Question

Quizplus · Accepted Answer

Dr. Chang is using stratified sampling as she is dividing the population into homogeneous groups (based on grade level) and then randomly selecting a sample from each group. This ensures that each group is represented equally in the sample and improves the accuracy of the results.

DrChang Is Conducting a Research Study of Undergraduate Students at Her