After considering the sampling problems associated with Problem 1, your friend decides to interview people who literally are "on the street." That is, he stands on a downtown sidewalk and takes as his population passersby who come near enough that he might buttonhole them for an interview. List four sources of bias that you believe might prevent him from obtaining a truly random sample of interviewees.
Problem 1
"The average person on the street is not happy," or so claimed the newscaster after interviewing patrons of a local sports bar regarding severe sanctions that had been imposed on the state university for NCAA infractions.
(a) What population does the newscaster appear to have in mind?
(b) What is the sample in this instance?
(c) Do you believe this sample is representative of the apparent population? If not, in what ways might this sample be biased?