Organic Grains LLC uses statistical process control to ensure that it's health-conscious, low-fat, multi grain sandwich loaves have the proper weight.

Based on a previously stable and in control process, the control limits of x- and R- charts are:

UCLx-= 6.72 LCLx-= 6.18

UCLr= 1.128 LCLr= 0

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

a. based on X bar chart, is one or more samples beyond the control limit? yes or no

b. based on the R-chart, is one or more sample beyond the control limit? yes or no

Sample 1 2 3 Loaf # 1 6.6 6.3 5.7 6.5 5.9 Net Weight Loaf # 2 Loaf # 3 6.7 6.7 6.5 6.4 5.7 5.6 6.7 6.5 5.9 5.8 Loaf #4 6.8 6.6 5.9 6.5 6.1 4 5