Suppose the process for manufacturing electrical shafts is in control. At the end of each hour, for a period of 20 hours, the manufacturer randomly selects one shaft and measures the diameter. The measurements (in inches) for the 20 samples are recorded in the table. Construct and interpret a control chart for shaft diameter.

Transcribed Image Text:

ELECSHAFT Sample Diameter (inches) Sample Diameter (inches) 1 1.505 11 1.491 1.496 12 1.486 3 1.516 13 1.510 4 1.507 14 1.495 1.502 15 1.504 1.502 16 1.499 1.489 17 1.501 8 1.485 18 1.497 9. 1.503 19 1.503 10 1.485 20 1.494 6700