IQCC (version 1.0)

xbarI: 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.

Value

• Return a x-bar control chart for phase I.

Details

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

See Also

xbarII

Examples

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