Question

You want to assess the attitudes towards math by the students in your school district. you first divide the district into groups, in this case the twenty different high schools. we then randomly select five of the schools. this would conclude the first stage. in each school we then have natural groups of students (each math class would represent a group). so we randomly select five classes from each school. these are the students who we will sample. this is an example of what type of sample?

Answer 1

I tried Stratified random sampling and that's not the answer.

Answer 2

This is an example of STRATIFIED RANDOM SAMPLING.
Stratified random sampling refers to method of sampling in which the target population is first divided into smaller groups based on the features that are common to these groups. Random samples are then taken from these smaller groups.