Question

Why are random samples used in public opinion polls?

Answer 1

So that everyone in the population have a equal chance in particpating?

Answer 2

A random sample refers to a sample of people that is chosen randomly. This type of samples are commonly used in public opinion polls. The main reason why these samples are chosen is because these type of samples help researchers avoid bias and other unwanted effects. By having a greatly varied sample, researchers are more likely to be able to study the effects that they want without the influence of other unexpected factors.