Is the process still in control? Explain why or why not. 2 answers below »

Whole 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 = 6.56. LCLx = 5.84, UCLR = 1.141, 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

6.3

6.0

5.9

5.9

2

6.0

6.0

6.3

5.9

3

6.3

4.8

5.6

5.2

4

6.2

6.0

6.2

5.9

5

6.5

6.6

6.5

6.9

Is the process still in control? Explain why or why not.