A production process for the JMF Semicon is monitored using x-bar and R charts. 10 samples of n-15 observations have been gathered with the following results: Sample Mean Range 251 29 258 45 3. 233 36 275 25 234 35 6. 289 20 7. 256 3 265 19 246 14 10 323 46 Calculate the center line (CL), upper control limit (UCL), and lower control limit (LCL) for x-bar and R charts, and then draw the conclusion about whether the process is in control or not.

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A production process for the JMF Semicon is monitored using x-bar and R charts. 10 samples of n=15
observations have been gathered with the following results:
Sample Mean Range
251 29
2.
258 45
3.
233 36
4
275 25
234 35
289 20
7.
256 3
265 19
9.
246 14
10
323 46
Calculate the center line (CL), upper control limit (UCL), and lower control limit (LCL) for x-bar and R charts,
and then draw the conclusion about whether the process is in control or not.
Transcribed Image Text:A production process for the JMF Semicon is monitored using x-bar and R charts. 10 samples of n=15 observations have been gathered with the following results: Sample Mean Range 251 29 2. 258 45 3. 233 36 4 275 25 234 35 289 20 7. 256 3 265 19 9. 246 14 10 323 46 Calculate the center line (CL), upper control limit (UCL), and lower control limit (LCL) for x-bar and R charts, and then draw the conclusion about whether the process is in control or not.
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