A Statistics instructor wishes to know the average age (in month)of his 200 students.He is too lazy to sample all 200 students so he decides to choose 20 students at random from the class and ask them for their age.In the class,students are sitting in twenty rows each of size ten.He randomly selects two rows of students and samples all students in those rows.This sampling method is called a

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The instructor is selecting two entire rows of students, which is a form of cluster sampling. In this method, the population is divided into clusters or groups, and a random sample of the clusters is selected. Then, all individuals from the selected clusters are included in the sample. Therefore, the instructor is selecting two clusters (rows) and all individuals within those clusters to form the sample.

A Statistics Instructor Wishes to Know the Average Age (In