A three sigma limit is a statistical calculation that refers to data within three standard deviations from a mean. It shows ...

The limits are calculated from the data that is plotted on the control chart. They are placed +/-3 sigma away from the average line. Control limits are used to mark the point beyond which a sample ...

The following statements create the chart shown in Output 38.4.1 ... and it is decided to eliminate these batches from the data set and recompute the control limits. The following statements create a ...