annabelle9610 annabelle9610

24-05-2023
Mathematics

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University and college students average 7.2 hours of sleep per night with a standard deviation of 30 minutes. If the amount of a sleep is normally distributed, find the following: a) What proportion of university and college students sleep for more than 8 hours? P(X> 8) = b) What is the amount of sleep that is exceeded by only 20% of students?

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