An actuarial assumption is an approximation of an uncertain variable incorporated in a financial model, typically for the calculation of benefits or premiums. For example, a typical actuarial assumption relates to the prediction of a lifespan of a person in regards to the health conditions, gender, age and other factors. Actuaries utilizes large tables of statistical data which connects the uncertain variable to numerous key predictive variables. Provided with the predictive variable values, a sound actuarial assumption can be derived for the uncertain variable.