Before polling the students in Scion School of Business, a researcher divides all the current students into groups based on their class standing, such as freshman, sophomores, and so on. Then, she randomly draws a sample of 50 students from each of these groups to create a representative sample of the entire student body in the school. Which of the following sampling methods is the researcher practicing? 1. stratified random sampling 2. simple random sampling 3. cluster sampling 4. systematic random sampling 5. snowball sampling

Correct option: 3. Cluster Sampling.

Step-by-step explanation:

Cluster sampling method is the type of sampling where first the entire population is divided into groups and then a random sample of fixed size is selected from each group.

In this case also, the researcher first divides the population of students in Scion School of Business into groups according to their class standing.

Then he selects 50 students from each of these groups to create a representative sample of the entire student body.

Thus, the sampling method used is Cluster Sampling.