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2020 Democratic Presidential Candidates
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(06-19-2019, 10:43 AM)Kane Wrote:(06-12-2019, 02:02 PM)StroudCrowd1 Wrote: I don't believe in polls. The fact that I have never been polled makes me believe in them even less. Interesting, but I remember the question from college. How large a sample size is necessary for a population of 300 million, to get a confidence level of 95% that your margin of error is 3%? https://www.checkmarket.com/sample-size-calculator/ And the answer is, 1,068. Use the sample size calculator above. In fact, 1,068 is a large enough sample size for any size population. I remember the professor showing us this. Of course, the trick is to get a random sample, and that's where the real work comes in, but 1,068 is quite sufficient. |
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