The principle of phoenix high school is conducting an in depth study of graduates since she has been there. firstm she creates a list of every student that has graduated since she has been principle and assigns each graduate a number 1 to 1241. she then has a computer randomly select 40 numbers between 1 and 1241 to determine which students she will include in her sample.

simple random sampling

stratified sampling

cluster sampling

sampling of convenience

systematic sampling