imprecision


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imprecision

(ĭm-prē-sĭ′shŭn)
The amount or degree of random error in an assay, research study, or calculation, usually represented by the standard deviation, coefficient of variation, or range.
References in periodicals archive ?
Besides imprecision and bias, possible potential sources of uncertainty are observed, including different concentrations of calibrators and reagent in different lots, multiple technologists' involvement and environmental conditions such as humidity and temperature fluctuations.
We created a band of error-transformed values by adding or subtracting the allowable imprecision to the upper and lower ends of the bias-transformed values and using the most extreme values.
Each of the 12 true glucose concentrations per hour was measured by a simulated glucose assay with a defined imprecision and bias.
5%, and the maximum analytical imprecision (CVa) = 0.
In addition to the intermediate imprecision QC data method above, we also calculated the SDs and z values from the imprecision data obtained from duplicate analysis of patient samples after exclusion of outliers.
A simulation model that considers bias and imprecision separately has been used to model the effects of glucose meter error on subcutaneous insulin dose (15).
Y = bias + total imprecision + random patient interferences (1)
A method for direct estimation of imprecision profiles, with reference to immunoassay data.
To examine the role of imprecision on diagnostic accuracy, we obtained data from a multisite clinical trial on the use of the ADVIA Centaur BNP assay (5).
The distribution of values for a cTnI assay, assuming an imprecision profile with a 25% CV at the 99th percentile limit of 0.
ADVISORY: Certain information regarding the company, including management's assessment of future plans and operations, may constitute forward-looking statements under applicable securities law and necessarily involve risks associated with oil and gas exploration, production, marketing and transportation such as loss of market, volatility of prices, currency fluctuations, imprecision of reserve estimates, environmental risks, competition from other producers and ability to access sufficient capital from internal and external sources; as a consequence, actual results may differ materially from those anticipated.