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Mathematics, 19.07.2019 01:10 csnow

120 hardness measurements are made on a large slab of steel with an average of rockwell c value of 39 and a standard deviation of 4.0. what percent of measurements should fall between 35 and 45?

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120 hardness measurements are made on a large slab of steel with an average of rockwell c value of 3...
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