Mathematics, 18.10.2021 23:00 aleiahmartin
The stiffness of a certain type of steel beam used in building construction has mean 30 kN/mm and standard deviation of 2.2 kN/mm. A random sample of 121 steel beams is drawn. What is the probability that the sample mean stiffness of the beams is greater than 30.15 kN/mm? Express your answer in decimals.
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The stiffness of a certain type of steel beam used in building construction has mean 30 kN/mm and st...
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