900 Numbers Radio and television stationsoften air controversial issues during broadcast
Chapter 8, Problem 21(choose chapter or problem)
900 Numbers Radio and television stationsoften air controversial issues during broadcast timeand ask viewers to indicate their agreement or disagreementwith a given stand on the issue. A poll isconducted by asking those viewers who agree to call acertain 900 telephone number and those who disagreeto call a second 900 telephone number. All respondentspay a fee for their calls.a. Does this polling technique result in a randomsample?b. What can be said about the validity of the results ofsuch a survey? Do you need to worry about a marginof error in this case?
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