a. Describe why the Literary Digest poll of 1936 has
b. What caused this poll to be so wrong?
5.8 a. What is meant by self-selected sample?
b. Give an example of a recent poll that involved a
c. Why are self-selected samples not desirable?
5.9 A regular feature in a newspaper asks readers to
respond via e-mail to a survey that requires a yes
or no response. In the following day’s newspaper,
the percentage of yes and no responses are
reported. Discuss why we should ignore these
5.10 Suppose your statistics professor distributes a
questionnaire about the course. One of the questions
asks, “Would you recommend this course
to a friend?” Can the professor use the results
to infer something about all statistics courses?