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The task of framing a building has been estimated to take an average of 25 days with a standard deviation of 4 days. What duration
The task of framing a building has been estimated to take an average of 25 days with a standard deviation of 4 days. What duration should be used if there is to be a 90 percent confidence that the duration will not be exceeded? What is the probability that the duration will exceed 23 days?
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