To select a sample of undergraduate students in the United S

To select a sample of undergraduate students in the United States, I select a simple random sample of four states. From each of these states, I select a simple random sample of 2 colleges or universities. Finally, from each of these 8 colleges or universities, I select a simple random sample of 20 undergraduates. My final sample consists of 160 undergraduates. This is an example of

simple random sampling.

stratified random sampling.

multistage sampling.

convenience sampling.

Solution

This is

multistage sampling.

first stage was to randomly select 4 states, and then to randomly select colleges, and then to randomly select students.