Measurement error


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Measurement error

Errors in measuring an explanatory variable in a regression, which leads to biases in estimated parameters.

Measurement Error

The difference between the value of some quantity and the value obtained by measuring it. It is nearly impossible to attain accurate measurements all the time, especially when one uses a single means of calculation. For this reason, when measuring the value of a company or asset, many analysts will check and double-check their work, and perhaps calculate the value using a different method, in order to ensure accuracy. See also: Audit, Due diligence.
References in periodicals archive ?
The assumptions include the following: a) The relationship between the personal and ambient exposure must be linear and homoscedastic, b) the associations between outcome and exposure must be linear on the scale of the link function used, c) the degree of measurement error is not severe, d) the measurement error is nondifferential, and e) the ambient exposure measure would not be associated with the outcome of interest if personal exposures were available.
Tool measurement error can be adjusted based on repeated measurements of known defects or from NDE tool manufacturers' claimed resolution.
If raters do not adhere to rules, measurement errors may occur that adversely affect the reliability of the measure.
A list of anticipated quality claims for a single patient result may include, but are not limited to, correctly identifying a patient's health status, the amount of uncontrollable [+ or -] measurement error that is estimated to exist with a reported result, the risk for patient mitt-classification, and, if applicable, the possible risk for reduced reimbursement for targeted patient populations.
In order to determine the measurement errors of the different meters, the signal reading of each meter was divided by the signal reading of the commercial reference meter A (UDT268UVA) (1) when they all measured the same 365 nm source in the figure.
With regard to the headline budget balance data, several factors may generate a RT measurement error in the headline budget balance figures.
Spurious correlations occur because the measurement error in x affects the variables plotted on both the x- and y-axes.
Hence, residual analysis at the end of sample is all that is available to decipher whether an 'extreme' value for the last observation is a measurement error or a break.
To so do, we explore the measurement error and subsequent data-revision process for real gross domestic product (RGDP).
In terms of aggregation, our findings suggest that there is a trade-off between the level of aggregation and measurement error.
Although pedometers tend to underestimate ambulation during slow walking, the magnitude of measurement error has been found to be within acceptable ranges during usual walking (Melanson et al.
Measurement error is an inescapable part of scientific inquiry.
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