Question: Please answer in type mode or clear hand-writing 3. (20 marks) An electronic circuits' producer decided to use process control by measuring circuit voltage. The

Please answer in type mode or clear hand-writing

3. (20 marks) An electronic circuits' producer decided to use process control by measuring circuit voltage. The past voltage data for 6 samples of 3 circuits are as follows: Sample Voltage 6.7 6.1 7.3 2 6.5 6.2 5.8 3 5.9 6.3 6.9 4 5.9 6.8 5.4 5 7.3 7.5 5.9 6 6.5 5.5 7.2 a. Calculate control limits for the range and mean charts, and discuss whether or not the process is in statistical control. b. The sample data for a subsequent week had the values: 5.2,6.1, and 7.9. What conclusion can be reached about the state of the process

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