USA Today conducted a survey asking readers, “What is the most hilarious thing that has ever happened to you en route or during a business trip?” a) What kind of sampling method is this? b) Are the results likely to be biased? Explain. Solution a) This is self-selection sampling, where the readers voluntarily choose to be a part of sample. b) Due to self selection, the sample is typically biased towards the subjects with stronger opinions. Typically indifferent subjects do not participate in such survey, and thus the survey mis-represents the population..