Question: A quality analyst wants to examine a packaging process that has an overall average weight of 993 lb. The average range based on the samples

A quality analyst wants to examine a packaging process that has an overall average weight of 993 lb. The average range based on the samples is 18 lb. If she use a sample size of 12, calculate LCL for the R chart with 3 limits (i.e., with confidence level 99.73%).

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