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The Number of Hours of Sleep Per Night Averaged by a Group

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The number of hours of sleep per night averaged by a group of students is approximately normally distributed with mean The number of hours of sleep per night averaged by a group of students is approximately normally distributed with mean and standard deviation . What is the probability that a student selected at random had more than 7.5 hours of sleep? Round to 2 decimal places. and standard deviation The number of hours of sleep per night averaged by a group of students is approximately normally distributed with mean and standard deviation . What is the probability that a student selected at random had more than 7.5 hours of sleep? Round to 2 decimal places. . What is the probability that a student selected at random had more than 7.5 hours of sleep? Round to 2 decimal places.

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