Question: 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

A production process for the JMF Semicon is

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 1 251 29 2 258 45 3 233 36 4 275 25 5 234 35 6 289 20 7 256 3 8 265 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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