A researcher is conducting a study to determine how knowledg

A researcher is conducting a study to determine how knowledgeable teenagers are about making good food choices. She decides to interview teenagers eating at a fast food restaurent. Why might the results be biased?

a) because they were taken from a simple random sample

b) because they were taken from a census

c) becuase they were taken from a stratified sample

d) because they were taken from a voluntary response sample

e) because they were thaken from a convenience sample

Solution

Answer: e) because they were thaken from a convenience sample

The most obvious criticism about convenience sampling is sampling bias and that the sample is not representative of the entire population.