accuracy


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ac·cur·a·cy

(ak'kū-ră-sē), Do not confuse this word with precision.
The degree to which a measurement, or an estimate based on measurements, represents the true value of the attribute being measured. In the laboratory, accuracy of a test is determined when possible by comparing results from the test in question with results generated using reference standards or an established reference method.

accuracy

[ak′yərəsē′]
the extent to which a measurement is close to the true value.

accuracy

The degree to which, on average, a test represents the true value—i.e., is unbiased.

Lab medicine
The extent to which a value from a test reflects or agrees with the reference value of the analyte being tested, measured statistically by standard deviations; the proportion of correct outcomes of a method (often used interchangeably with concordance in two-by-two tables).

Accuracy is insufficient for describing the performance of medical tests and deciding when to use what, because accuracy has two separate components and depends on the prevalence of the condition for which the test is appropriate. The degree of reproducibility of test results, regardless of whether or not they are accurate, are measured statistically by the coefficient of variation; the degree to which a measurement (e.g., the mean estimate of a treatment effect) is true or correct. An estimate can be accurate, yet not be precise, if it is based upon an unbiased method that provides observations having great variation—i.e., not close in magnitude to each other.

accuracy

Lab medicine The extent to which a value from a test reflects or agrees with the reference value of the analyte being tested, measured statistically by standard deviations; the proportion of correct outcomes of a method–often used interchangeably with concordance. See Coefficient of variation, Diagnostic accuracy, Inaccuracy, Two-by-two table. Cf Precision.

ac·cur·a·cy

(ak'kyūr-ă-sē)
The degree to which a measurement represents the true value of the attribute that is being measured; refers to the closeness of an analytic result to an actual result.

accuracy

the closeness with which an observation or a measurement of a variable approximates its true value. An important component of diagnostic tests. An accurate test implies freedom from both random and systematic error. See also precision.
References in periodicals archive ?
In this article, we will generally state accuracy in terms of a constant tolerance (that is [+ or -] 10% NWT) with a variable certainty: 70, 80 or 90% of the time.
Accuracy was the only variable significantly correlated with performance.
The Measurements of Neutron Beam Polarization With an Accuracy (1-2) X [10.
For instance, the business team first deliberated whether the emphasis of the test and evaluation team should be placed on promoting the worst-to-best gain in accuracy performance, or whether success should be sold on the fleet average performance improvement.
3) Their work suggests four important areas to consider when verifying the accuracy of information: (i) authority, (ii) independent corroboration, (iii) plausibility and support, and (iv) presentation.
Familiarity with the item-coding instructions in the User's Manual is still the best place to start in order to achieve MDS coding accuracy.
Siegel also notes that a heightened need for volumetric accuracy is driven by industry factors.
Of the top 20 PGA scoring leaders for 1994, 10 placed among the top 20 in greens in regulation, nine for putting, and only four for driving accuracy.
Empathic accuracy must be carefully managed because of its potential to hurt as well as to heal, to cause injury as well as to avoid or ameliorate it," Ickes holds.
On closer examination of the green sand casting process variables, the complexity and the need for absolute control and continual monitoring to achieve consistent dimensional accuracy are readily evident.
Customers need a tool to know if the high precision and accuracy possible with IEEE 1588 equipped products is actually working in their networks.

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