Question

A school has 5000 students. There are 1500 freshman, 1500 sophomores, 1000 juniors, and 1000 seniors. At 8:00 AM, all students are in class, there are 200 classes that each have 25 students. The administration wants to give a survey asking the students about their favorite classes. They wish to poll 100 students. A random number generator is used to select a random number between 1 and 50, and the number 28 is chosen. Using the entire school roster, the school polls the 28th student on the list, and then every 50th student after. What sampling method was used? convenience simple random sample systematic cluster stratified