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Title: Estimating Category B Degrees Of Freedom
Author: Howard Castrup
Source: 2000 Measurement Science Conference
Year Published: 2000
Abstract: A method is presented for estimating uncertainties in cases where samples of data are unavailable. The method includes a formalism that provides a structure for extracting information from the measurement experience of scientific or technical personnel. This information is used to both estimate uncertainties and to approximate the degrees of freedom of the estimate. Using these results, confidence limits are developed that obviate the need for arbitrary coverage factors and misleading expanded uncertainties.

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