Question: A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to

A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results Machine #1 #2 #3 17 16 23 Measurements 15 25 24 15 18 23 What is the sample mean for machine #1? 17 25 22
 A quality analyst wants to construct a control chart for determining

A quality analyst wants to construct a control chart for determining whether three machines, oll producing the same product, are in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results What is the sample mean for machine 1

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