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 8.74 hours of sleep, with a standard deviation of 2.55 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed. Give your answers to 4 decimal places. Use at least 3 decimal places for your z-scores. (a) What is the probability that a visually impaired student gets less than 6.9 hours of sleep? answer: (b) What is the probability that a visually impaired student gets between 6.8 and 9.83 hours of sleep? answer: (c) Fourty percent of students get less than how many hours of sleep on a typical day? answer: hours

MATLAB: An Introduction with Applications
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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 8.74 hours of sleep, with a standard deviation of 2.55 hours. Assume that the number of hours of sleep for these visually
impaired students is normally distributed. Give your answers to 4 decimal places. Use at least 3 decimal places for your z-scores.
(a) What is the probability that a visually impaired student gets less than 6.9 hours of sleep?
answer:
(b) What is the probability that a visually impaired student gets between 6.8 and 9.83 hours of sleep?
answer:
(c) Fourty percent of students get less than how many hours of sleep on a typical day?
answer:
hours
problem
Transcribed Image Text: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 8.74 hours of sleep, with a standard deviation of 2.55 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed. Give your answers to 4 decimal places. Use at least 3 decimal places for your z-scores. (a) What is the probability that a visually impaired student gets less than 6.9 hours of sleep? answer: (b) What is the probability that a visually impaired student gets between 6.8 and 9.83 hours of sleep? answer: (c) Fourty percent of students get less than how many hours of sleep on a typical day? answer: hours problem
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