TS 13216
Standard Practice for Calculating Sample Size to Estimate, With a Specified Tolerable Error, the Average for 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 prescribed precision, a measure of quality for all the units of a lot of material, or produced by a process.
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About This Item
TS 13216 addresses a standard practice for calculating the sample size needed to estimate the average of a quality characteristic for a lot or a process within a specified tolerable error. In practical terms, it is a statistical planning tool for deciding how large a random sample should be when the goal is to estimate a population mean from only part of the material or output.
Sample size and estimation precision
The central idea is to determine how many units must be included in a random sample so that the estimated mean is precise enough for the intended use. The core concepts are sample size, random sampling, and estimation accuracy. In manufacturing and inspection settings, this helps balance measurement effort against the level of confidence and precision sought. It is especially relevant when dealing with lots of material or units produced by a process, where checking every item is impractical.
Where the practice fits in statistics and quality work
- The document is about estimating an average quality measure; it is not a product-specific test method for individual defect types.
- Its scope applies broadly to lots of material and to outputs generated by a process.
- It provides simple calculation methods for sampling planning rather than detailed apparatus, acceptance limits, or product rules.
- The TSE record is withdrawn, but the subject remains useful for understanding statistical sample planning.
- Publication Date: 30.11.2006
- Standard Status: H (İptal Edilmiş Standard/Withdrawn standard)
- Publisher: TSE
- Document Language: tr
- ICS Classification: 03.120.30 İstatistiksel Metotların Uygulanması
- Pages: 14
- Source Standard: ASTM E 122:2000
- International Equivalents: ASTM E 122--; ANSI/ASTM E 122 -EQV
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