Question

Which is a valid sample of middle school students?

⚫️every tenth boy entering the school
⚫️every third student attending an after-school activity
⚫️every third student who enters each homeroom
⚫️every tenth person attending a school football game

Answer 1

Every third student who enters each homeroom

Explanation:

This would produce the least biased results as every third student gives a 3/x for students and there are y homerooms, giving the least biased results.