Nancy inc manufactures 4 ounce chocolate bars random


Nancy, Inc. manufactures 4 ounce chocolate bars. Random samples of size four were taken and weighed. Eight hours of observation provided the following data.

Sample       Mean       Range

1                4.01          0.14

2                4.03          0.18

3                3.98          0.16

4                 4.20          0.17

5                 3.89          0.13

6                4.00         0.18

7                4.05          0.17

8                 4.03          0.16

9                4.08          0.15

a. Determine the 3 sigma upper and lower control limits for the x-bar chart.

b. Determine the 3 sigma upper and lower control limits for the R-chart.

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Operation Management: Nancy inc manufactures 4 ounce chocolate bars random
Reference No:- TGS01523918

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