On Dynamic Survival Past Extropy Properties‎

Abstract

‎This paper deals with the dynamic survival past extropy as a measure of uncertainty in the past lifetime‎ ‎distributions‎. ‎We introduce a quantile version of the extropy function in past lifetime‎. ‎Various properties of the proposed measure are obtained‎. ‎Additionally‎, ‎some stochastic comparisons‎ ‎and bounds are derived and the performance of the dynamic survival past extropy of parallel and series system is studied as well‎.