Do You Believe There Are Monsters Under Your Bed or In Your Closet?

Here's a great example of voluntary response bias.

Voluntary response bias is when you let people answer a survey or poll, and the results thusly become skewed because only people who really care about it will answer.

I asked Yahoo Answers if people believe if there were monsters under their bed.

All of the 3 people responded in the affirmative. Using this survey, I could (unreasonably) conclude that 100% of people on Yahoo Answers believe there is a monster under their bed.

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