Quote:
Originally Posted by Stuart C
5,000 out of one million plus customers? That's (at most) 0.5%. I don't think that is a resonable sample (in fact, I am pretty sure most surveys have a margin of error considerably larger than that).
But, I don't want to go off topic.
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Actually, election opinion polls are conducted on a far smaller sample of the electorate than that. A decent general election exit poll would query about 20,000 of the 25 million or so people who vote on the day and expect a margin of error of perhaps +/- 3%.