Question: While developing x-bar and R charts, the manager took 10 samples each of size 6. The average of sample means was 3.2. The average range

While developing x-bar and R charts, the manager took 10 samples each of size 6. The average of sample means was 3.2. The average range value was 0.6. What will be the value of UCL for the x-bar chart?

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