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en.wikipedia.org/wiki/Opinion_poll

An opinion poll, sometimes simply referred to as a poll, is a human research survey of public opinion from a particular sample. Opinion polls are usually designed to represent the opinions of a population .... Others suggest that a poll with a random sample of 1,000 people has margin of sampling error of 3% for the estimated ...

en.wikipedia.org/wiki/Survey_sampling

In statistics, survey sampling describes the process of selecting a sample of elements from a ... Any use of nonprobability sampling methods (e.g., cut-off or model-based ... A survey based on a probability sample can in theory produce statistical ... unbiased, the expected value of the sample mean is equal to the population ...

www.answers.com/Q/The_best_polls_take_a_random_sample_from_the_population_being_polled_What_does_that_mean

every person in the population has the same chance of being selected. ... The best polls take a random sample from the population being polled What does that mean? The best polls take a random sample from the population being polled ...

www.aapor.org/Education-Resources/Election-Polling-Resources/Sampling-Methods-for-Political-Polling.aspx

To sample individuals, polling organizations can choose from a wide variety ... In a probability sample, all persons in the target population have a known chance of being ... For example, in a telephone survey based on random digit dialing (RDD) ... Participants are included in the sample by other means—typically because ...

blog.verint.com/random-sampling-explained

Feb 16, 2009 ... Those telephone polls used random sampling, where the AOL poll used a ... of selecting any member of the population ("probability sampling"). ... When dealing with people, you need to make sure that there is an ... Interestingly, the random in random sampling doesn't mean that there can't be a pattern.

www.robertniles.com/stats/margin.shtml

So companies, campaigns and news organizations ask a randomly selected ... But how many people do you need to ask to get a representative sample? ... that the people you picked do not accurately represent the U.S. population as a whole ? ... gives you a margin of error of 2.5 percent, which is pretty darn good for a poll.

www.crf-usa.org/election-central/public-opinion-polls.html

Assessing Public Opinion Polls Building your Own Public Opinion Poll Part One ... Everything else being equal, an election poll of 100,000 out of two million voters ... Although you probably don't have the means to conduct a scientific opinion poll, you can take an informal poll. ... Try to get a random sample of the population.

www.pewresearch.org/fact-tank/2016/09/08/understanding-the-margin-of-error-in-election-polls

Sep 8, 2016 ... Because surveys only talk to a sample of the population, we know that ... result that we would get if we interviewed everyone in the population. ... A plus or minus 3 percentage point margin of error would mean that 48% ... News reports about polling will often say that a candidate's lead is .... It's being fixed.

www.pewresearch.org/methodology/u-s-survey-research/frequently-asked-questions

You have roughly the same chance of being called as anyone else living in the ... The key to survey research is to have a random sample so that every type of ... marketing but not opinion polling or market research that does not involve an ... Most good telephone surveys of the general public use what is called a random ...

cstl-cla.semo.edu/rdrenka/renka_papers/polls.htm

The object is not to poll the whole population, but rather to draw a sample from it and directly poll them for sake of .... The term "random" does not mean haphazard or nonscientific. ..... They often make no pretense of being legitimate surveys.