X-bar Shewhart Control Chart for phase I.
Builds the x-bar control chart for phase I.
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. |
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
Examples
data(pistonrings) cchart.Xbar1(pistonrings[1:25, ])#> [[1]] #> [1] 74.001176000 0.009785039 #>
