A design engineer measured the service life of a halogen headlamp his company produces. On three recent production batch
Posted: Mon May 30, 2022 5:29 pm
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 LCL for the mean control chart, using
3-sigma control limits? 422.56 373.27 720.07 None of the other
choices are correct 670.77
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 LCL for the mean control chart, using
3-sigma control limits? 422.56 373.27 720.07 None of the other
choices are correct 670.77