A high school principal wants to estimate the average number of hours per week that students spend on homework. She obtains a list of all 1,200 students from the registrar, assigns each student a number from 1 to 1,200, and uses a random number generator to select 60 distinct numbers. The students corresponding to those numbers are surveyed about their weekly homework hours.
Which sampling method is being used?
- A
Cluster sample
- B
Stratified random sample
- Ccheck_circle
Simple random sample
- D
Systematic sample
Explanation
Every group of 60 students has an equal chance of being selected because the principal randomly draws 60 distinct numbers from the full roster. This is the defining property of a simple random sample.