Question

A process in statistical control guarantees that the percent defectives is zero.

Answer 1

The control chart is a graph used to study how a process changes over time. Data are plotted in time order. A control chart always has a central line for the average, an upper line for the upper control limit and a lower line for the lower control limit. These lines are determined from historical data.

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Answer 2

a control chat always has a Central Line for the average and upper line for the upper control limit and lower line for the lower control limit these lines are determined from historical data