Question
The bit on a drill lasts a mean of 680 hours, with a standard deviation of 18 hours, To avoid drilling errors, a shop manager
The bit on a drill lasts a mean of 680 hours, with a standard deviation of 18 hours, To avoid drilling errors, a shop manager wants to keep the probability of failure to less than 0.004. How many hours should the bit be used for before it is replaced?
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Statistics For Engineers And Scientists
Authors: William Navidi
3rd Edition
73376345, 978-0077417581, 77417585, 73376337, 978-0073376332
