The time to wear out of a cutting tool has been found to be…

Written by Anonymous on June 21, 2021 in Uncategorized with no comments.


The time tо weаr оut оf а cutting tool hаs been found to be distributed normally with a mean of 280 hrs. and standard deviation of 60 hrs. a. What is the probability of wear out in 150 hrs.? (Select the numerical answer.) Answer = [Answer_1] b. How often should the tool be replaced at the machine in order to ensure a defective part rate of less than 10% (assume no other factors lead to defective parts). Answer = [Answer_2] hrs. (Refer to the below table for any probability look-up. Recall "CTRL" and "+" increasing magnification in any browser.)  

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