Computations from 10 samples show that on the average the


Sample      Mean          Range

1             10.47          3.26

2              10.74          6.09

3              11.24          2.39

4                9.14          2.84

5                9.37          3.74

6                8.59          2.22

7              10.27          2.03

8                8.92          3.35

9              11.34            .18

10                8.40           1.47

Computations from 10 samples show that on the average the number of defects is 9. The three sigma control limits for the above control chart would be:

a) 1.6 - 4.8       b) 0 - 3.75      c) 0 - 9       d) 0 – 18

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Operation Management: Computations from 10 samples show that on the average the
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