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Resistors for electronic circuits are manufactured on a high-speed automated machine. The machine is set up to...

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Operations Management

Resistors forelectronic circuits are manufactured on a high-speed automatedmachine. The machine is set up to produce a large run of resistorsof 1,000 ohms each. Use Exhibit 10.13.

     To set up the machine and to create acontrol chart to be used throughout the run, 15 samples were takenwith four resistors in each sample. The complete list of samplesand their measured values are as follows: Use three-sigma controllimits.

SAMPLE NUMBERREADINGS (IN OHMS)
1109210991016979
210119781023976
39741003996998
498198810011007
59929769781001
6988103010301014
7102210101021990
81010998981975
999710189831024
101028974989989
1197210101007992
12101398110021009
13100510219961014
14995973971975
15101110019871015

a.Calculate the mean and range for the above samples. (Round\"Mean\" to 2 decimal places and \"Range\" to the nearest wholenumber.)

b.Determine X=X= and R−R− . (Round youranswers to 3 decimal places.)

c.Determine the UCL and LCL for a X−X− chart. (Roundyour answers to 3 decimal places.)

d.Determine the UCL and LCL for R-chart. (Leave nocells blank - be certain to enter \"0\" wherever required. Round youranswers to 3 decimal places.)

e.What comments can you make about the process?

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