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Mathematics, 06.05.2020 04:16 laurieburgess804
High-strength concrete is supposed to have a compressive strength greater than 6,000 pounds per square inch (psi). A certain type of concrete has a mean compressive strength of 7,000 psi, but due to variability in the mixing process it has a standard deviation of 420 psi, assuming a normal distribution.
What is the probability that a given pour of concrete from this mixture will fail to meet the high-strength criterion?
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