In 2005 the San Francisco Bay Times reported on a poll in New Zealand that found that New Zealanders opposed the nation's new gay-inclusive civil-unions law by a 3-1 ratio. This poll was a call-in poll that cost $1 to participate in. The San Francisco Bay Times article also reported that a scientific polling organization found that New Zealanders favor the law by a margin of 56.4% to 39.3%.
Which of the following statements is correct about the reliability of the polls?
A.
The polling result of neither call-in poll nor the scientific polling organization can be considered reliable as there is so much difference in the results of two polls.
B.
The scientific polling organization may not have produced the reliable result and therefore causing its results to differ so much with the result of the call-in poll.
C.
The call-in poll used the Voluntary Response method, so their poll results cannot be considered reliable.
Answer: C.
The call-in poll used the Voluntary Response method, so their poll results cannot be considered reliable.
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