A theory of explanation might treat explanations in either a realist or an epistemic (that is, anti-realist) sense. A realist interpretation of explanation holds that the entities or processes an explanation posits actually exist--the explanation is a literal description of external reality.
Officers in pay grades O-1, O-2, and O-3 with more than four years of prior cumulative service in an enlisted or warrant officer grade are paid increased wages using the special pay grades of O-1E, O-2E, and O-3E, respectively.
The median salary, rather than the mean salary, more accurately represents actual earnings in an occupation. Why You Should Look at Median Salary Instead of Mean Salary In the above example, we looked at three salaries that had a difference of $15,000 between the highest and lowest ones ($35,000-$20,000). It is not unusual for there to be a disparity between the lowest and highest salaries in a field.