Organic Grains LLC uses statistical process control to
Organic Grains LLC uses statistical process control to ensure that its health-conscious, low-fat, multigrain sandwich loaves have the proper weight. Based on a previously stable and in-control process, the control limits of the – and R -charts are = 6.56., = 5.84, = 1.141, , = 0. Over the past few days, they have taken five random samples of four loaves each and have found the following:
Is the process still in control? Explain why or why not.