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Mathematics, 10.03.2020 02:36 treyceratops1082
A Brinell hardness test involves measuring the diameter of the indentation made when a hardened steel ball is pressed into material under a standard test load. Suppose that the Brinell hardness is determined for each specimen in a sample of size 32, resulting in a sample mean hardness of 64.3 and a sample standard deviation of 6.0. Calculate a 99% lower confidence bound for true average Brinell hardness for material specimens of this type.
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A Brinell hardness test involves measuring the diameter of the indentation made when a hardened stee...
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