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(Solved): The strength of cold-rolled brass bars has been tested for many years by an engineering firm. The st ...



The strength of cold-rolled brass bars has been tested for many years by an engineering firm. The strength of the specimens in . in.) is normally distributed with a mean of 70 kips and a standard deviation of 11 kips . For a given specimen, find the probability that the strength will be: 9. less than 60 kips 10. more than 79 kips

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11. between 61 and 75 kips

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