Rebecca Roush, Manager of the Home Square (Home Improvement) Store $\alpha$

Essay

Rebecca Roush, Manager of the Home Square (home improvement) store in Athens, would like to determine whether an employee's number of years practicing his/her trade prior to working in retail is the same for employees in the plumbing, electrical, and paint departments.Data on the number of trade-practice years were available for 20 employees and are listed below. Test whether the three populations are identical in terms of number of years of trade-practical experience. Use $\alpha$ = .05.