Engineering, 25.12.2020 21:50 chops85

Mean length of life of a certain cutting tool is 41.5 hours with a standard deviation of 2.5 hours. What is the probability that a simple random sample of size 50 drawn from this population will have a mean between 40.5 and 42 hours

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Mean length of life of a certain cutting tool is 41.5 hours with a standard deviation of 2.5 hours....