Chocolate, 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 3.96 0.13 2 4.03 0.16 3 3.97 0.16 4 4.14 0.16 5 3.88 0.11 6 4.03 0.18 7 4.04 0.18 8 4.07 0.14 (a) Determine the upper and lower control limits for the x chart. (Round your answers to four decimal places.) UCL=?? LCL=?? (b) Determine the upper and lower control limits for the R chart. (Round your answers to four decimal places.) UCL=?? LCL=??

Practical Management Science
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Chocolate, 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 3.96 0.13
2 4.03 0.16
3 3.97 0.16
4 4.14 0.16
5 3.88 0.11
6 4.03 0.18
7 4.04 0.18
8 4.07 0.14
(a)
Determine the upper and lower control limits for the x chart. (Round your answers to four decimal places.)
UCL=??
LCL=??
(b)
Determine the upper and lower control limits for the R chart. (Round your answers to four decimal places.)
UCL=??
LCL=??
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