A design engineer measured the service life of a halogen headlamp his company produces. On three recent production batch

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answerhappygod
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A design engineer measured the service life of a halogen headlamp his company produces. On three recent production batch

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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 If the design engineer uses an LCL of 480 and UCL
of 520 for the mean control chart, which sample will be out of
control? None of the other choices are correct Sample 3 Sample 1
and 2 All samples are out of control Sample 1
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