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Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
STANDARD published on 1.10.2007
Designation standards: ASTM E122-07
Note: WITHDRAWN
Publication date standards: 1.10.2007
SKU: NS-40906
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
calculating test values, empirical knowledge, sampling, size, statistical methods, ICS Number Code 03.120.30 (Application of statistical methods)
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 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. |
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2. Referenced Documents | ||
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