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Transforming Q into ϖ in AS by variables
Transforms the quality index, Q, into the estimated lot percent defective, ϖ.
2024.Nov.25 05:10:40
Q Quality index. •
n Sample size. •
Qmin, Qmax For graph. •
Show values ? Shows the graph coordinates.

In "acceptance sampling" by (Gaussian) variables, transforms the quality index, Q, into the "estimate of the lot percent defective" (fraction nonconforming), ϖ, as in the standard Z1.9 [Z1.9].
 Plots ϖ vs. Q, as required, for the given sample size.
 For the base data, the standard gives ϖ = 3.95 %.

References: Plate: ASvarQtoLotPD

• ANSI/ASQ Z1.9, "Sampling procedures and tables for inspection by variables for percent nonconforming", ASQ, Milwaukee, WI (USA).

• Google: Mil-Std-414

• Google: "acceptance sampling"

• 1629-04-14: Huygens, Christiaan (1695-07-07).

 
 
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Created: 2014-04-14 — Last modified: 2014-04-15