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Accuracy is also used as a statistical measure of how well a binary classification test correctly identifies or excludes a condition. That is, the accuracy is the proportion of correct predictions (both true positives and true negatives) among the total number of cases examined. [10] As such, it compares estimates of pre- and post-test probability.
This suggests that the accuracy of Wikipedia is high. However, the results should not be seen as support for Wikipedia as a totally reliable resource as, according to the experts, 13 percent of the articles contain mistakes (10% of the experts reported factual errors of an unspecified degree, 3% of them reported spelling errors)." [89]
The average Wikipedian on English Wikipedia is (1) a man, (2) technically inclined, (3) formally educated, (4) an English speaker (native or non-native), (5) white, (6) aged 15–49, (7) from a nominally Christian country, (8) from an industrialized nation, (9) from the Northern Hemisphere, and (10) likely employed as an intellectual rather ...
The validity of a measurement tool (for example, a test in education) is the degree to which the tool measures what it claims to measure. [3] Validity is based on the strength of a collection of different types of evidence (e.g. face validity, construct validity, etc.) described in greater detail below.
For case #1, a widely accepted standard of "accurate" and "inaccurate" exists. For #2, any answer would be baseless even if not proven wrong and not considered to be accurate. For #3 the objective standard does not exist. Any answer is a value judgement and the concept of accuracy is less applicable.
A famous example of verifiable material that is potentially inaccurate is the front page of the Chicago Tribune on November 3, 1948—we have an article about this headline at "Dewey defeats Truman". In this case, we have a retraction from the newspaper which provides strong evidence that the material was inaccurate.
This statistics -related article is a stub. You can help Wikipedia by expanding it.
An 'error' is a deviation from accuracy or correctness. ... set point and the process value. An example of this would be the thermostat in a home heating system ...