ASTM E691 PDF

Document Center Inc. The statistical techniques described in this practice provide adequate information for formulating the precision statement of a test method. This software can be run on PC compatible computers, and hard copy tables and graphs can be printed on dot-matrix printers. The data obtained in the interlaboratory study may indicate, however, that further effort is needed to improve the test method. For practical purposes, the discontinuous nature of measurements of these types may be ignored when a test result is defined as an average of several individual measurements. Then, this practice may be applicable, but caution is required and a statistician should be consulted.

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Document Center Inc. The statistical techniques described in this practice provide adequate information for formulating the precision statement of a test method. The data obtained in the interlaboratory study may indicate, however, that further effort is needed to improve the test method. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Significance and Use 4. This practice may be used in obtaining the needed information as simply as possible. This information may then be used to prepare a precision statement in accordance with Practice E Knowledge of the test method precision is useful in commerce and in technical work when comparing test results against standard values such as specification limits or between data sources different laboratories, instruments, etc. A measure of the degree of agreement among these test results describes the precision of the test method for that material.

Numerical measures of the variability between such test results provide inverse measures of the precision of the test method. Greater variability implies smaller that is, poorer precision and larger imprecision. However, when accepted reference values are available for the property levels, the test result data obtained according to this practice may be used in estimating the bias of the test method. For a discussion of bias estimation and the relationships between precision, bias, and accuracy, see Practice E A well-developed test method, including a ruggedness test to determine control of test method conditions, is essential.

ATHA PUKU PDF

ASTM E691 - 19

More E This practice may be used in obtaining the needed information as simply as possible. This information may then be used to prepare a precision statement in accordance with Practice E Knowledge of the test method precision is useful in commerce and in technical work when comparing test results against standard values such as specification limits or between data sources different laboratories, instruments, etc. A measure of the degree of agreement among these test results describes the precision of the test method for that material. Numerical measures of the variability between such test results provide inverse measures of the precision of the test method.

DATAMINE STUDIO 3 MANUAL PDF

ASTM E691:16

Document Center Inc. The statistical techniques described in this practice provide adequate information for formulating the precision statement of a test method. The data obtained in the interlaboratory study may indicate, however, that further effort is needed to improve the test method. This standard does not purport to address all of the safety concerns, if any, associated with its use.

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