Question: A quality analyst wants to construct a control chart for determining whether three machines that produce the same part are under 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 that produce the same part are under control with regard to a particular quality variable. Four parts were randomly taken from each machine with the following measurements: Machine 21 20 #1 #2 #3 Measurements 23 22 24 25 21 24 23 21 22 23 22 21 #4 22 22 If the upper control limit is 25 and the lower control limit is 20, which machine appears to be out of control? O #1 O #2 O #4 #3 o

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