• ASTM E122-17

ASTM E122-17

  • Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot o
  • standard by ASTM International, 04/01/2017
  • Category: ASTM

$48.00 $24.00

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.

PDF

All of our standards document are available in PDF (Portable Document Format), an electronic, downloadable format.You will be able to download the file in your account downloads.

Multi-User Access

After purchasing, you have the ability to assign each license to a specific user.

Printable

At any time, you are permitted to make printed copies for your and your members' reference use.

ASTM E1770-19

ASTM E1770-19

Standard Practice for Optimization of Instrumentation for Graphite Furnace Atomic Absorption Spectro..

$24.00 $48.00

ASTM E3157-19

ASTM E3157-19

Standard Guide for Understanding and Using Information Related to Installation of Firestop Systems..

$35.00 $69.00

ASTM C516-19

ASTM C516-19

Standard Specification for Vermiculite Loose Fill Thermal Insulation..

$21.00 $42.00

ASTM A471/A471M-19

ASTM A471/A471M-19

Standard Specification for Vacuum-Treated Alloy Steel Forgings for Turbine Rotor Disks and Wheels..

$24.00 $48.00