Question: A manager wants to build a 3-sigma range chart for a process. 9 samples are collected, with 6 items in every sample. The average of

A manager wants to build a 3-sigma range chart for a process. 9 samples are collected, with 6 items in every sample. The average of sample means is 15.01, and the average range is 6.4. What is the UCL of the range chart? Note: Round your final answer to 1 decimal place. Your

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