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by Kalrog
Mon Dec 17, 2007 11:45 am
Forum: General Gun, Shooting & Equipment Discussion
Topic: CNN reports 2nd Amendment poll results
Replies: 18
Views: 1772

Re: CNN reports 2nd Amendment poll results

LarryH wrote:
Texas Armadillo wrote:"The CNN/Opinion Research Corporation telephone poll of 1,002 U.S. adults was carried out December 6 - 9."

They think a sampling of 1000 people give them an accurate idea of what millions think? :roll:
I don't recall the specific numbers, but statistical theory gives a minimum sample size for a poll to have some "credibility". A responsible report would have included at statement to the effect that "This poll has a statistical error of plus or minus 3%" (or whatever number corresponds to the actual sample size.
As long as the sample is truly random and the questions are correctly worded (the biggest way to fudge the numbers is the wording), then yes that is most certainly a statistically valid sample. As long as you do it right, you can get a pretty good sample with as few as 50 people, but most polls go for the roughly 1000 person size. That seems to be the point of diminishing returns for national polls.

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