Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students averaged 8.418.41 hours of sleep, with a standard deviation of 2.532.53 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed. (a) What is the probability that a visually impaired student gets less than 6.26.2 hours of sleep? answer: (b) What is the probability that a visually impaired student gets between 6.46.4 and 9.659.65 hours of sleep? answer: (c) Thirty percent of students get less than how many hours of sleep on a typical day? answer: ________ hours
Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students averaged 8.418.41 hours of sleep, with a standard deviation of 2.532.53 hours. Assume that the number of hours of sleep for these visually impaired students is
(a) What is the probability that a visually impaired student gets less than 6.26.2 hours of sleep?
answer:
(b) What is the probability that a visually impaired student gets between 6.46.4 and 9.659.65 hours of sleep?
answer:
(c) Thirty percent of students get less than how many hours of sleep on a typical day?
answer: ________ hours
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