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2004•Unpublished venueRequires access

Study on the Calculation of the Error Type II by Using Test Data

Qian Xue-wei

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Abstract

The calculation method of the error type Ⅱ in measurement flow by velocity-area method is presented. The core concept in this method is that the variance and systematic error of the error type Ⅱ should be separated from the variance and systematic error of the total error in the mean velocity at a given vertical. The calculated results in four gauging stations show that this method is not only reasonable but also more accurate and feasible compared with formulas recommended by ISO 1088-1985.

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What this paper is about

The calculation method of the error type Ⅱ in measurement flow by velocity-area method is presented. The core concept in this method is that the variance and systematic error of the error type Ⅱ should be separated from the variance and systematic error of the total error in the mean velocity at a given vertical. The calculated results in four gauging stations show that this method is not only reasonable but also more accurate and feasible compared with formulas recommended by ISO 1088-1985.

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Available abstract

The calculation method of the error type Ⅱ in measurement flow by velocity-area method is presented. The core concept in this method is that the variance and systematic error of the error type Ⅱ should be separated from the variance and systematic error of the total error in the mean velocity at a given vertical. The calculated results in four gauging stations show that this method is not only reasonable but also more accurate and feasible compared with formulas recommended by ISO 1088-1985.

Key concepts: Variance (accounting), Statistics, Systematic error, Mathematics, Observational error, Type (biology), Type I and type II errors, Error analysis

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