xbarI {IQCC}R Documentation

X-bar Shewhart Control Chart for phase I.

Description

Builds the x-bar control chart for phase I.

Usage

xbarI(x, sizes)

Arguments

x The data to be plotted.
sizes A value or a vector of values specifying the sample sizes associated with each group.

Details

Even if the data is not normal the x-bar statistic will be close to the normal by the central limit theorem.

Value

Return a x-bar control chart for phase I.

Author(s)

Daniela R. Recchia, Emanuel P. Barbosa

See Also

xbarII

Examples

data(pistonrings)
xbarI(pistonrings[1:25,])

[Package IQCC version 1.0 Index]