Question: I need help with this question A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product,

I need help with this question

I need help with this question A quality analyst

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 Measurements #1 17 15 15 17 #2 16 25 18 25 #3 23 24 23 22 What are the x-bar chart three-sigma upper and lower control limits? Multiple Choice O 22 and 18 23.5 and 16.5 O 24 and 16 23.16 and 16.84 O 23.29 and 16.71

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