Jorge wants to find the most popular way for teens to volunteer in the community. He cannot decide between two methods. Option 1: He will ask every fifth person on each English class roster. Option 2: He will attend a walkathon to ask teen participants about the ways they volunteer. Which statement about the methods is true? Option 1 is biased. Option 2 is biased. Neither is biased. Both are biased.
Option 2 would be biased. Asking people participating in a walkathon means you are asking people that are already volunteering. To get a non-biased sample, you have to be sure that you are including people that are not guaranteed to be volunteers; you don't have that in this situation.
