You are currently doing research on college rank and number of hours worked. You have divided students into three groups by class. You think that these three groups of young adults work different hours per week.

	Freshman	Sophomore	Juniors
	14	15	22
	15	16	14
	18	19	13
	15	12	17
	13	18	19
x	15	16	17
s	1.87	2.74	3.67

The total mean (x_total) for all 15 students is 16.

1. Review the mean scores for each group. What statement(s) can be made about the relationship between hours worked per week and college rank?
2. Suppose we wanted to test the relationship between hours worked per week and college rank in the US population. State the null and research hypotheses that would represent this relationship.
3. Conduct a hypothesis test and interpret the results using alpha =.05. In plain English, what can you conclude about the relationship between hours worked per week and college rank? If it is appropriate, you should also discuss the strength of the relationship based upon a suitable measure.