Are nursing salaries in Tampa, Florida lower than those in Dallas, Texas? Salary.com provided salary data showing staff nurses in Tampa earn less than staff nurses in Dallas. (The Tampa Tribune, January 15, 2007). Suppose that a follow-up study of 40 nurses in Tampa and 40 nurses in Dallas shows a sample mean of $55,400 in Tampa and a sample mean of $56,100 in Dallas. The nurses are matched for education level, years of experience, etc. Youwant to know whether the mean salary for Tampa nurses is lower than the mean salary for Dallas nurses.