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Originally Posted by pxpx
It's been many many years since I did any stats maths mumbo jumbo so I googled:
http://www.surveysystem.com/sscalc.htm
146,311,000 registered voters in 'murica as of 2012
Go for a 95% confidence level, with 2.5% confidence interval
Sample size req'd = 1,537 |
That all holds true unless you cherry-pick your sample. Then it can be skewed in whatever the heck way suits your agenda.
Not saying that's what's happening here, but it HAS happened before in US politics.