Question

8. The distribution of hours of sleep per week night, among college students, is found to be Normally distributed, with a mean of 6.5 hours and a standard deviation of 1 hour.

1). 3pts. What proportion of the students have sleep hours more than 8 hours? Show your work

2). 4pts. What proportion of the college students have sleep hours between 5 and 7 hours? Show your work.

3). 3pts. What is the probability that a student has exactly 6.5 sleep hours.

4). 4pts. What sleep hour does a student have to be in an upper 5%? Show your work.

4). 4pts. What is the lower quartile of the sleep hours for college students? Show your work.

Answer 1