A design engineer measured the service life of a halogen
headlamp his company produces. On three recent production batches,
he tested service life on random samples of four headlamps each.
sample Service life (hours) 1 525 515 505 655 2 555 575 610 400 3
590 580 450 600 What is the CL for the mean control chart? 535
546.67 540 551.67 None of the other choices are correct
A design engineer measured the service life of a halogen headlamp his company produces. On three recent production batch
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