Question

A principal wants to find out how many hours per week the students in the school spend

on exercise. Which sample is likely to be most representative of the student population?

Answer 1

I think B (Every fifth student from each grade)

A only talks about female students, C talks about students on a sports team which would be biased since the students on the sports team probably get more exercise, and d would be ok but not the best since some last names are more common and others you would get only a very small sample size.