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The population of lumber is normally distributed with a mean of 30.05 inches and a standard deviation of 0.3 inches. What is the probability that
The population of lumber is normally distributed with a mean of 30.05 inches and a standard deviation of 0.3 inches. What is the probability that the average length of a piece of lumber from a sample of 9 units is more than 29.95 inches long?
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