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ASTM E122

Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process

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Organization: ASTM
Publication Date: 1 April 2017
Status: active
Page Count: 5
ICS Code (Application of statistical methods): 03.120.30
scope:

This practice covers simple methods for calculating how many units to include in a random sample in order to estimate with a specified precision, a measure of quality for all the units of a lot of material, or produced by a process. This practice will clearly indicate the sample size required to estimate the average value of some property or the fraction of nonconforming items produced by a production process during the time interval covered by the random sample. If the process is not in a state of statistical control, the result will not have predictive value for immediate (future) production. The practice treats the common situation where the sampling units can be considered to exhibit a single (overall) source of variability; it does not treat multi-level sources of variability

The system of units for this standard is not specified. Dimensional quantities in the standard are presented only as illustrations of calculation methods. The examples are not binding on products or test methods treated

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee

Document History

ASTM E122
April 1, 2017
Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
This practice covers simple methods for calculating how many units to include in a random sample in order to estimate with a specified precision, a measure of quality for all the units of a lot of...
August 1, 2009
Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
This practice covers simple methods for calculating how many units to include in a random sample in order to estimate with a specified precision, a measure of quality for all the units of a lot of...
August 1, 2009
Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
This practice covers simple methods for calculating how many units to include in a random sample in order to estimate with a specified precision, a measure of quality for all the units of a lot of...
October 1, 2007
Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
This practice covers simple methods for calculating how many units to include in a random sample in order to estimate with a specified precision, a measure of quality for all the units of a lot of...
October 10, 2000
Standard Practice for Calculating Sample Size to Estimate, with a Specified Tolerable Error, the Average for a Characteristic of a Lot or Process
1. Scope 1.1 This practice covers simple methods for calculating how many units to include in a random sample in order to estimate with a prescribed precision, a measure of quality for all the units...
June 10, 1999
Standard Practice for Choice of Sample Size to Estimate a Measure of Quality for a Lot or Process
1. Scope 1.1 This practice covers simple methods for calculating how many units to include in a random sample in order to estimate with a prescribed precision, a measure of quality for all the units...
December 10, 1997
Standard Practice for Choice of Sample Size to Estimate the Average for a Characteristic of a Lot or Process
A description is not available for this item.
January 1, 1989
Standard Practice for Choice of Sample Size to Estimate a Measure of Quality for a Lot or Process
A description is not available for this item.
April 3, 1972
STANDARD RECOMMENDED PRACTICE FOR CHOICE OF SAMPLE SIZE TO ESTIMATE THE AVERAGE QUALITY OF A LOT OR PROCESS (R 1979) (E-1979)
A description is not available for this item.

References

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