Difference between revisions of "Statistical sampling"
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'''Statistical sampling''' is the process of finding a representative portion of a large population. In quality control, a percentage of products will be selected at random for testing, and the results ''extrapolated'' to the population. For example, out of 100,000 [[car]]s produced, 30 might be crash-tested. The results will be assumed to hold for the entire population of cars actually sold. | '''Statistical sampling''' is the process of finding a representative portion of a large population. In quality control, a percentage of products will be selected at random for testing, and the results ''extrapolated'' to the population. For example, out of 100,000 [[car]]s produced, 30 might be crash-tested. The results will be assumed to hold for the entire population of cars actually sold. | ||
| − | In [[public opinion]] polls, | + | In [[public opinion]] polls, samples must be carefully done in order to avoid several kinds of bias. |
[[Category:Probability and Statistics]] | [[Category:Probability and Statistics]] | ||
Revision as of 14:26, May 12, 2017
Statistical sampling is the process of finding a representative portion of a large population. In quality control, a percentage of products will be selected at random for testing, and the results extrapolated to the population. For example, out of 100,000 cars produced, 30 might be crash-tested. The results will be assumed to hold for the entire population of cars actually sold.
In public opinion polls, samples must be carefully done in order to avoid several kinds of bias.