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There are 8,000 students at a local university. The average age of all students at this university is 24 years with a standard deviation of

There are 8,000 students at a local university. The average age of all students at this university is 24 years with a standard deviation of 9 years. A simple random sample of 36 students is selected. What is the probability that the sample mean will be larger than 25.5 years?

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