In each part, indicate whether the sample should be called a self-selected sample or a convenience sample.
a. To assess passenger satisfaction, an airline distributed questionnaires to 100 passengers in the airline's frequent flyer lounge. All 100 individuals responded, and 95 respondents said that they had a high degree of satisfaction with the airline.
b. A magazine contains a survey about sexual behavior. Readers are asked to mail in their answers, and n = 2000 readers do so.