A disgruntled University of Toronto employee reads the list (published in The Globe and Mail) of U

Question:

A disgruntled University of Toronto employee reads the list (published in The Globe and Mail) of U of T staff who earn over $100,000 annually. The employee claims that for staff in this category, mean salaries are different based on the starting letters of their last names. A random sample from the full list follows. (Salaries are in thousands of dollars.) At the 0.05 level of significance, test the claim that the means are not equal for the three groups shown.