A journal published a study of the lifestyles of visually impaired students. Using diaries, the students kept track of several variables, including number of hours of sleep obtained in a typical day....

A journal published a study of the lifestyles of visually impaired students. Using diaries, the students kept track of several variables, including number of hours of sleep obtained in a typical day. These visually impaired students had a mean of 8.29 hours and a standard deviation of 2.11 hours. Assume that the distribution of the number of hours of sleep (X) for this group of students is approximately normal. Find the P(X < 6)="">