UstdI {IQCC}R Documentation

Standardized Shewhart u chart for phase I.

Description

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

Usage

UstdI(par, sizes, length)

Arguments

par The sample ratios used to estimate the Poisson parameter(lambda).
sizes A value or a vector of values specifying the sample sizes associated with each group.
length The length of the data.

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.

Value

Return a standardized u chart.

Author(s)

Daniela R. Recchia, Emanuel P. Barbosa

See Also

UstdII

Examples

data(moonroof)
attach(moonroof)
UstdI(par=ui[1:17],sizes=ni[1:17],length=17)

[Package IQCC version 1.0 Index]