Web Results

en.wikipedia.org/wiki/Opinion_poll

An opinion poll, often simply referred to as a poll or a survey, is a human research survey of public opinion from a particular sample. Opinion polls are usually designed to represent the opinions of a population ... The first known example of an opinion poll was a local straw poll conducted by The ..... Random House, 1993.

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

The best polls take a random sample from the population being polled What ... What does polled mean? ... What is the purpose of random sampling in a poll?

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 ...

www.robertniles.com/stats/margin.shtml

So companies, campaigns and news organizations ask a randomly selected small ... people who will accurately represent the beliefs or opinions of the entire population. But how many people do you need to ask to get a representative sample? ... gives you a margin of error of 2.5 percent, which is pretty darn good for a poll.

www.pewresearch.org/methodology/u-s-survey-research/sampling

In all of our surveys, we use probability sampling to help ensure adequate representation ... A random sample can be selected from such a list and invitations to ... by the design effect); and the proportion of the total population being sampled. ... from UK-based research firm YouGov as part of their election polling efforts, and ...

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 the result ... 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 “outside ...

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 ...

www.janda.org/c10/Lectures/topic05/GallupFAQ.htm

The process of polling is often mysterious, particularly to those who don't see how ... In a recent Gallup "poll on polls," respondents said that polls generally do a good ... randomly selected, small percent of a population of people can represent the ... of being selected in a sample, then that sample will be representative of the  ...