Question: 4. (25 points) A high-voltage power supply should have a nominal output voltage of 350 V. A sample of four units is selected each day

4. (25 points) A high-voltage power supply should have a nominal

4. (25 points) A high-voltage power supply should have a nominal output voltage of 350 V. A sample of four units is selected each day and tested for process control purposes unit and the nominal voltage times ten; that is, xi= (observed voltage on unit i - 350)10 a. Set up x and R charts on this process. Is the process in statistical control

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