A process that is considered to be in control measures an ingredient in ounces. Below are the last 10 samples (each of size n = 5) taken. The population process standard deviation is 1.2

Samples	Item 1	Item 2	Item 3	Item 4	Item 5
1	9	10	9	8	12
2	11	9	10	11	11
3	13	8	11	11	8
4	11	11	11	11	10
5	13	9	9	12	9
6	10	9	9	13	8
7	9	11	9	8	8
8	14	10	8	11	8
9	8	9	11	13	9
10	10	11	10	7	11

a) Standard deviation of the sampling means = ____ ounces

b) With z = 3 the control limits for the mean chart are:

UCLx =______ounces

LCLx =_____ ounces

c) The control limits for the R-chart are:

UCLR =_______ounces

LCLR =______ounces

d) Based on the x-chart, is one or more samples beyond the control limits? YES or NO

Based on the R-chart, is one or more samples beyond the control limits? YES or NO