Which statement is True about Statistical Process Control:

If any of the items in the sample is outside the control$-$limits then the process is not in$-$control.

If some of the items in the sample are above the upper control limit and some are below the lower control$-$limits then the process is not in$-$control.

If the sample statistic $($e$.$g$.,$ average, proportion$)$ is outside the controllimits then the process is not in$-$control.

If most of the items in the sample are outside the control$-$limits then the process is not in$-$control.