UextII {IQCC}R Documentation

Exact (improved) u chart for phase II.

Description

This function builds an improved version of the Shewhart u chart where the traditional normal-based control limits are corrected for the non-normality of the u-statistic for phase II.

Usage

UextII(x, sizes, lambda, length)

Arguments

x The data to be plotted.
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.

Details

To use this function it is necessary to have the information about the UextI.

Value

Return the improved U chart.

Author(s)

Daniela R. Recchia, Emanuel P. Barbosa

See Also

UextI

Examples

data(moonroof)
attach(moonroof)
uexI<-UextI(x=yi[1:17],sizes=ni[1:17],par=ui[1:17],17)
UextII(x=yi[18:34],sizes=ni[18:34],lambda=uexI[1],length=17)

[Package IQCC version 1.0 Index]