Polls and predictions - Opinion polls in a nutshell (#3/4)
April 21, 2015
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1:44Now PlayingPolls and predictions - Opinion polls in a nutshell (#3/4)
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Who carried out the first opinion poll and why are they so popular?
This lighthearted and revealing clip examines the real purpose of polling voters and how you ensure the accuracy of a sample. Narrated by Professor Kevin McConway.
(Part 3 of 3)
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