Reply to Dr. Al- Youse! Comment on: A Stochostic Approach to the Estimation of the Number of Survi-vals at Each Age[l]

Abstract

We begin with the point that some studies of the number of survivals at each age,<br>has approached the problem assuming it to be deterministic phenomenon as rep-resented<br>by Makeham's law. Dr. Al-Yousef has treated the problem in his paper<br>entitled "The analytical adjustment of life tables"[2] by using deterministic model to<br>represent the stochastic phenomenon of birth and death. How can we use a<br>mathematical expression for a random process!. This is questionable and wrong. Dr.<br>Al-Yousef has failed to take into account the random element explicit in his model.<br>He considered the number of survivals at each age as a mathematical and not a ran-dom<br>variable.