PchartI {IQCC} | R Documentation |
This function builds the traditional Shewhart 3-sigma normal-approx. p chart for phase I (retrospective / validation analysis).
PchartI(x, sizes, par, length)
x |
The data to be plotted. |
sizes |
A value or a vector of values specifying the sample sizes associated with each group. |
par |
The data used to estimate the phat (x/sizes). This data is used only in this phase. |
length |
The length of the data. |
This chart is based on normal-approx. and should be used only for large values of np or ni.pi (np>6).
Return the Shewhrat p chart.
Daniela R. Recchia, Emanuel P. Barbosa
Montgomery, D.C.,(2008)."Introduction to Statistical Quality Control". Chapter 11. Wiley
data(binomdata) attach(binomdata) PchartI(par=pi[1:12],x=Di[1:12],sizes=ni[1:12],12)