cchart.Xbar1 {IQCC}

X-bar Shewhart Control Chart for phase I.

Description

Builds the x-bar control chart for phase I.

Usage

cchart.Xbar1(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

cchart.Xbar2

Examples

data(pistonrings)
cchart.Xbar1(pistonrings[1:25, ])