Mathematics, 05.12.2019 04:31 dylannsquats
Specifications for an aircraft bolt require that the ultimate tensile strength be at least 18 kn. it is known that 10% of the bolts have strengths less than 18.3 kn and that 5% of the bolts have strengths greater than 19.76 kn. it is also known that the strengths of these bolts are normally distributed.
a. find the mean and standard deviation of the strengths
b. what proportion of the bolts meet the strength specification?
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