2.1.24.4.53 QCD2

Description

Quality Control D2 Factor.

Syntax

double QCD2( UINT nn )

Parameters

nn
[input] Sample or subgroup size where nn>0.

Return

Quality Control D2 Factor which is used to estimate the standard deviation of a parent distribution (or population) from an average range. The standard deviation of the parent distribution=average range/factor.

The returned factors assume sampling from a normal population.

Examples

EX1

void QCD2_ex1()
{
UINT nn=4;
double dD2;
dD2=QCD2(nn); // results in dD2==2.058750
}

Remark

Quality Control D2 Factor.