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The weight of trucks traveling on a particular section of I-475 has a population mean of 15.8 tons and a population standard deviation of 6.2

The weight of trucks traveling on a particular section of I-475 has a population mean of 15.8 tons and a population standard deviation of 6.2 tons. What is the probability a state highway inspector could select a sample of 50 trucks and find the sample mean to be 14.3 tons or less?

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