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
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 (measurement). Accordingly, he sampled five units of output from each machine, with the following results: Sample 1 Sample 2 Sample 3 Sample 4 Samples 11.1 10.1 9.8 11.3 11.2 9.2 11.2 10.2 10.1 9.4 11.3 9.9 9.9 10.1 8.9 Determine the upper and lower control limits and decide if the process is in control

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