Difference between revisions of "Statistical sampling"
Jump to navigation
Jump to search
m |
(dewikify broken links) |
||
| Line 1: | Line 1: | ||
| − | '''Statistical sampling''' is the process of finding a representative portion of a large | + | '''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 whole. For example, out of 100,000 [[car]]s produced, 5 will be crash-tested. The results will be assumed to hold for the cars actually sold. |
| − | In [[public opinion]] polls, the people who are contacted must be carefully selected to avoid several kinds of | + | In [[public opinion]] polls, the people who are contacted must be carefully selected to avoid several kinds of selection bias. |
[[Category:Probability and Statistics]] | [[Category:Probability and Statistics]] | ||
[[category:Statistics]] | [[category:Statistics]] | ||
Revision as of 05:26, February 27, 2011
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 whole. For example, out of 100,000 cars produced, 5 will be crash-tested. The results will be assumed to hold for the cars actually sold.
In public opinion polls, the people who are contacted must be carefully selected to avoid several kinds of selection bias.