IQCC (version 1.0)

UstdII: Standardized Shewhart u chart for phase II.

Description

This function builds a standardized version of the u control chart for phase II.

Usage

UstdII(par, sizes, lambda, length)

Arguments

par

The data used to calculate the standardization.

sizes

A value or a vector of values specifying the sample sizes associated with each group.

lambda

The estimate of lambda.

length

The length of the data.

Value

• Return a standardized u chart.

Details

The standardized version of the u statistic has zero mean and unitary standard deviation, so that the center line is zero and the 3-sigma control limits are -3 and +3.

See Also

UstdI

Examples

data(moonroof)
attach(moonroof)
ustI<-UstdI(par=ui[1:17],sizes=ni[1:17],length=17)
UstdII(par=ui[18:34],sizes=ni[18:34],lambda=ustI[1],length=17)