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A study of college freshmen's study habits found that the time (in hours) that college freshmen study each week is approximately normally distributed with a

A study of college freshmen's study habits found that the time (in hours) that college freshmen study each week is approximately normally distributed with a mean of 7.2 hours and a standard deviation of 5.3 hours. What is the probability that a randomly chosen freshmen studies more than 9 hours?

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