Question

What would be the best way to get an unbiased sample that represents the population for the following topic: How do people feel about the new lit soccer fields?
1. Ask people playing on the soccer fields.
2. Randomly select 20 or 30 people to ask their opinion.
3. Ask people who live next to the soccer fields.
4. Ask, "Isn't it great people can play soccer at night?"

Answer 1

2. random samples are the least biased samples.