quality engineeing control

True/False 1. The S chart is often used instead of the R chart when a quick detection of short term variability is important. 2. Theoretically speaking, the ability of an X chart in detecting an out-of-control situation is the same whether the control limits of the chart are set at u +/- 20 or 30.1 3.If a process is not in control, the range of the control limits of the X chart would likely be greater than the range of specification limits. 4.The run chart can be used for monitoring both measurements and attributes. 5. Theoretically speaking, the ability of a 100P chart in detecting an out-of-control situation is greater than a P chart. 6.Dr. Shewhart recommended that the control limits of X control charts be set using sample sizes of 4 or 5 to save calculation time