One of the advantages of working for someone else is that the number of hours of work per week is limited as opposed to the number of hours for self-employed people.

a. Is there sufficient evidence to infer that self employed individuals (WRKSLF: 1 = Selfemployed, 2 = Someone else) work longer hours (HRS1)? What does the p-value tell you?

b. Are the required conditions satisfied?

c. If the required conditions are not satisfied, what other technique should be used?