Question: Control charts for a process have previously been constructed. The X-Bar Chart upper and lower control Imits are 92.5 and 88.5, respectively. New samples are

Control charts for a process have previously been constructed. The X-Bar Chart upper and lower control Imits are 92.5 and 88.5, respectively. New samples are taken from three machines with the following results Machine 41 #2 #3 Measrements 92.2 91.9 92.7 93.4 88.3 95.1 90.6 94.8 925 93.1 88.9 90.3 Which machine(s) If any appear(s) to have an out-of-control process mean based solely on the X-Bar Chart? Machine #1 Machine #2 Machine #3 Machine #1 and Machine #3 Machine #2 and Machine #3 All of the machines None of the machines

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