A process considered to be in control measures an ingredient in ounces. A quality inspector took...

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A process considered to be in control measures an ingredient inounces. A quality inspector took 10 samples, each with 5observations as follows:
Samples
Observations
1
2
3
4
5
1
10
9
10
9
12
2
9
9
11
11
10
3
13
9
10
10
9
4
10
10
11
10
10
5
12
10
9
11
10
6
10
10
8
12
9
7
10
11
10
8
9
8
13
10
8
10
8
9
8
8
12
12
9
10
10
12
9
8
12
a) Using this information, obtain three-sigma (i.e., z=3)control limits for a mean control chart and control limits for arange chart, respectively. It is known from previous experiencethat the standard deviation of the process is 1.36.
b) Discuss whether the process is in control or not.

Answer & Explanation Solved by verified expert

4.4 Ratings (718 Votes)

ab The process is in controla Compute X and R for each subgroup Plot control charts usingXbar R and control limits Observations Sample 1 2 3 4 5 6 78 9 10 10 10 13 10 12 10 10 13 1200 1000 900 1000 1000 900900 800 900 See Answer

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