In insurance, a person trained in statistics, accounting and mathematics who determines policy rates, reserves, and dividends by deciding what assumptions should be made with respect to each of the risk factors involved (such as the frequency of occurrence of the peril, the average benefit that will be payable, the rate of investment earnings, if any, expenses, and persistency rates), and who endeavors to secure as valid statistics as possible on which to base his assumptions. Professionally trained individual, usually with experience or education in insurance, who conducts statistical studies such as determining insurance policy rates, dividend reserves and dividends, as well as conducts various other statistical studies. A capitated health provider would not accept or contract for capitated rates, or agree to a capitated contract without an actuarial determining the reasonableness of the rates.