According to a recent study, the average night’s sleep is 8 hours. Assume that the standard deviation is 1.1 hours and that the probability distribution is normal. a) What is the probability that a randomly selected person sleeps for more than 8 hours? (2 marks) b) Doctors suggest getting between 7 and 9 hours of sleep each night. What percentage of the population gets this much sleep? (2 marks)

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Q: The average amount of sleep students get a night is normally distributed with a mean of 6.5 hours…

A: Normal distribution is also known as the Gaussian distribution . It is widely used in statistics .