A student was given an assignment to determine the percentage of students that brought a bag lunch to school. The student chose 5 random classrooms and surveyed
Mathematics
EmpyrealBlue
Question
A student was given an assignment to determine the percentage of students that brought a bag lunch to school. The student chose 5 random classrooms and surveyed every student in those classrooms. Which type of sampling did the student use?
A. convenience
B. systematic
C. stratified
D. cluster
A. convenience
B. systematic
C. stratified
D. cluster
2 Answer

1. User Answers andreatheshorty
I believe it's cluster sampling. 
2. User Answers JeanaShupp
Answer: D. cluster
Stepbystep explanation:
A cluster sampling is a random sampling method in which a researcher splits the entire population into separate groups known as clusters.Then, he draw a random sample of clusters from the population.
After this he performs his analysis on data from the sampled clusters.
Given: A student was given an assignment to determine the percentage of students that brought a bag lunch to school. The student chose 5 random classrooms and surveyed every student in those classrooms.
Here classes is denoted as clusters and the student as researcher.
Hence, the cluster sampling is used by the student.