Question: A process is in control at x = 1 0 0 and ? b a r ( R ) = 7 . 3 with n

A process is in control at x=100 and ?bar(R)=7.3 with n=4. Determine the upper control limit (UCL) for the x bar -R chart.
95.623
100.525
105.329
110.750
 A process is in control at x=100 and ?bar(R)=7.3 with n=4.

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