Select the method or formula of your choice.
In This Topic
Plotted points
Each data point, xi, is an observation.
Center line
The center line represents the process mean, μ. If you do not specify a historical value for the process mean, Minitab uses the mean of the observations.
Control limits
If you do not specify a historical value for the process standard deviation, σ, then Minitab estimates σ from your data using the specified method.
Lower control limit (LCL)
Upper control limit (UCL)
Notation
| Term | Description |
|---|---|
| μ | process mean |
| k | parameter for Test 1. The default is 3. |
