Radio and television stations often air controversial issues during broadcast time and ask viewers to indicate their agreement or disagreement with a given stand on the issue. A poll is conducted by asking those viewers who agree to call a certain 900 telephone number and those who disagree to call a second 900 telephone number. All respondents pay a fee for their calls.
Does this polling technique result in a random sample?
______________
Are the results of such a survey valid?
______________
Explain.
________________________________________________________

Question

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The Answer of Radio and television stations often air controversial issues during broadcast time and ask viewers to indicate their agreement or disagreement with a given stand on the issue. A poll is conducted by asking those viewers who agree to call a certain 900 telephone number and those who disagree to call a second 900 telephone number. All respondents pay a fee for their calls.
Does this polling technique result in a random sample?
______________
Are the results of such a survey valid?
______________
Explain.
________________________________________________________

Radio and Television Stations Often Air Controversial Issues During Broadcast