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

x- and R-charts are:

UCLx=6.13,

LCLx=5.67;

UCLR=1.161,

LCLR=0.

Over the past few days, they have taken five random samples of four loaves each and have found the following:

Net Weight Sample Loaf # 1 Loaf # 2 Loaf # 3 Loaf # 4 1 6.4 6.5 6.8 6.4 2 6.2 6.3 6.0 6.1 3 5.4 5.2 5.2 5.5 4 5.8 5.5 5.7 5.8 5 5.3 5.2 5.3 5.4

Based on the -x chart, is one or more samples beyond the control limits?

Based on the R-chart, is one or more samples beyond the control limits?