The following video is useful for a class discussion about the difference between scientific and non-scientific polls. 99% of you agree that it is also useful for your enjoyment.
Vodpod videos no longer available.
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August 19, 2009 by John
The following video is useful for a class discussion about the difference between scientific and non-scientific polls. 99% of you agree that it is also useful for your enjoyment.
Vodpod videos no longer available.
