Question: Suppose you have collected four samples, where each sample has six observations. The sample means and ranges have been calculated for each sample, which are

Suppose you have collected four samples, where each sample has six

Suppose you have collected four samples, where each sample has six observations. The sample means and ranges have been calculated for each sample, which are provided below. (a) What is the upper control limit for the R-chart? (Answer with three decimal places.) (b) What is the lower control limit for the x (x-bar)-chart? (Answer with three decimal places.)

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