Javier wants to collect data about the number of hours students in his school exercise each week. Based on the principles of simple random sampling, which of these is the best method for Javier to collect his data?

A Randomly select 20 students from both the girls’ and boys’ soccer teams.

B Randomly select 10 freshmen, 10 sophomores, 10 juniors, and 10 seniors.

C Choose any 3 buses, and randomly select a total of 40 students from those buses.

D Number all students in the school, and randomly select the numbers of 40 students.

Question

Javier wants to collect data about the number of hours students in his school exercise each week. Based on the principles of simple random sampling, which of these is the best method for Javier to collect his data?

A Randomly select 20 students from both the girls’ and boys’ soccer teams.

B Randomly select 10 freshmen, 10 sophomores, 10 juniors, and 10 seniors.

C Choose any 3 buses, and randomly select a total of 40 students from those buses.

D Number all students in the school, and randomly select the numbers of 40 students.