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13. Use the 68-95-97.7 rule to answer the following According to the American freshman, the number of hours that college freshman spend studying each week

13. Use the 68-95-97.7 rule to answer the following According to the American freshman, the number of hours that college freshman spend studying each week is normally distributed with a mean of 7 hours and a standard deviation of 5.3 hours. Find the percentage of college freshman who study between 7 and 12.3 hours each week

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