Question: Please show how to solve it using formulas not through excel. Quality Control Sample Problem 1 The Watson Electric Company produces incandescent lightbulbs. The following

Please show how to solve it using formulas not through excel.

Quality Control Sample Problem 1 The Watson Electric Company produces incandescent lightbulbs. The following data on the number of lumens for 40 watt lightbulbs were collected when the process was in control. 4 Observation Sample 1 2 3 1604 612 588 597 601 607 581 570 585 620 605 | 595 590 | 614 608 600 603 592 588 604 A) What type of control chart should be used here? B) What are the upper and lower control limits? C) Is the system in control? D) Since these data was collected, some new employees were hired. A new sample obtained the following readings: 570, 603, 623, and 583. Is the process still in control

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