Accuracy

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synonym accuracy (Accuracy) generally refers to accuracy

It refers to those measured for many times under certain experimental conditions average value The degree of conformity with the true value, which is used to indicate the size of the error.

Errors are divided into Accidental error and systematic error , where random error The size of is available Precision To indicate that the size of the system error can be Accuracy Accuracy is the combination of precision and accuracy, that is, accuracy is affected by accidental error and systematic error.

In practical work, reference materials or standard method conduct Control test In the absence of standard materials or standard methods Pure substance conduct Recovery test To estimate and determine accuracy. The size of the reflection coefficient difference refers to the degree to which the mean value of the data deviates from the true value.^[1]

When the error is small, you can also pass the Parallel determination The average value μ of as the true value T Estimated value 。 determination Precision Well, it is guaranteed to obtain good accuracy precondition Generally speaking, if the measurement precision is not good, it is impossible to have good accuracy. For an ideal analytical method and analysis result, both precision and accuracy are required.

Measurement accuracy finger measurement result And Measured The degree of consistency between truth values; The accuracy of a measuring instrument refers to the degree to which the measuring instrument gives a true value. Accuracy is only a qualitative concept without quantitative expression. measurement error Of absolute value Large, its accuracy is low. But accuracy is not equal to error. Accuracy only includes high and low; Large and small; Qualified and unqualified statements. For the accuracy of measuring instruments, there is also a level or other expression. It is wrong to give the accuracy of the dosage value, for example, the accuracy is 0.5 mg, where the reference to 0.5 mg is not clear.

Chinese name: Accuracy
Foreign name: accuracy

Pinyin: zhǔn què dù
Introduction: Yes indicates that in the measurement result systematic error and Accidental error The amount of magnitude

purpose

Accuracy: used to indicate the measurement results systematic error and Accidental error The degree of size

The closeness between the average value of multiple measurements and the true value.

Measured value and True value The degree of closeness is called accuracy, and the difference between the two is called error. Accuracy is usually expressed by error. The smaller the error, the higher the accuracy of the analysis results.

Accuracy depends on system error and Accidental error , indicating the correctness of the measurement results.

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