Question

At IU, 20% of the students are graduate students. I construct a random sample that consists of 20% graduate students from the student population to ask what their opinions are of the college's food service. This is __________.

A.stratified sampling
B. cluster sampling
C. systematic sampling
D. simple random sampling

Answer 1

The given sampling method is stratified sampling, where the population is divided into subgroups and a random sample is taken from each subgroup.

Step-by-step explanation:

The given sampling method is an example of stratified sampling. Stratified sampling is when the population is divided into distinct subgroups or strata, and then a random sample is taken from each subgroup. In this case, the population of students is divided into two groups: graduate students and non-graduate students. The sample consists of 20% of the graduate students from the population, indicating that the sampling is stratified based on the student's status as a graduate or non-graduate.