Small boxes of NutraFlakes cereal are labeled "net weight 10 ounces." Each hour, random samples of size n = 4 are weighed to check process control.

Five hours of observations yielded the following:

Using these data, construct limits for x and R charts. Is the process in control?

What other steps should the QC department follow at this point?

Time	Box 1	Box 2	Box 3	Box 4
9 a.m	9.8	10.4	9.9	10.3
10 a.m	10.1	10.2	9.9	9.8
11 a.m.	9.9	10.5	10.3	10.1
Noon	9.7	9.8	10.3	10.2
1 P.M.	9.7	10.1	9.9	9.9

Need this in EXCEL format