Is there a difference in mean hours slept for students in various years at college?

a. Give at least one reason why students in earlier years may get more sleep.

b. Give at least one reason why students in later years may get more sleep.

c. Use software to access the student survey data, and report the mean hours of sleep for sampled students in each of the five year levels.

d. Which sample mean is highest?

e. Which sample mean is lowest?

f. Use software to carry out the appropriate test; report the P-value.

g. Two of these express the correct conclusions to draw, given the size of the P-value; which two are they?

1. There is compelling evidence of a relationship between students' year at school and how much sleep they get, for populations of students in the various years.

2. There is no compelling evidence of relationship between students' year at school and how much sleep they get, for populations of students in the various years.

3. Mean amount of sleep may be equal for populations of students in the various years.

4. Mean amount of sleep is not equal for populations of students in any of the various years.

5. Mean amount of sleep is not equal for populations of students in at least two of the various years.