Wilcoxon Rank-Sum Test

A researcher is comparing the annual income of students who graduated from Belair College with students who graduated from Chapman University. A random sample was chosen from each college were selected. At a .10 level of significance is there a difference in the incomes of the students from the two colleges? Show all five steps of the hypothesis test. Show your ranking of the data.

Belair Chapman

Income (in thousands)	Rank	Income (in thousands)	Rank
31.6		58.5
33.4		31.1
14.7		36.4
30.5		24.3
36.1		46.2
33.6		30.5
31.3		39.5
35.6		51.5
57.0		41.2
37.8		22.2
20.5		36.4
28.1		72.8
34.9		41.6
33.7		28.8
40.3		32.4
		36.3
		56.4
		44.5
		33.4
		37.4