Question

You want to know the brand of jeans worn most often by people 20 to 30 years old. Which of the following surveys is biased?

Answer 1

answers
surveying people 20 to 30 years old at a store that sells one brand of jeans
surveying people 20 to 30 years old at a store that sells only jeans
surveying everyone at a store that sells only jeans

Answer 2

biased would mean that it will not make the survey efficient...i'll have to say the first one because it only limits the survey into one brand of jeans when you want to know what brand of jeans people wear

Answer 3

ok thank you