Question

A company wants to determine what brand of cereal people like best. Which of the following surveys is an example of selection bias? Survey #1Shoppers at a local pet store are asked which brand of cereal they prefer Survey #2A random sample of people are asked if they've tried the new fruity cereal, and then are asked which brand of cereal they prefer Survey #3 The question Which brand of cereal do you like best? was asked of randomly selected households

Answer 1

Survey #1 is an example of selection bias because the sample is taken from shoppers at a pet store, which may not be representative of the general population's preferences for cereal.