Document Type : Original Article

Authors

• Somayeh Abbasi ¹
• Mohammad Hossein Alamatsaz ²

¹ Department of Mathematics, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan,Iran

² Department of Statistics, University of Isfahan, Isfahan, Iran

Abstract

In this paper, we stochastically compare Harris family distributions having random tilt parameter with Harris family distributions having fixed tilt parameter. We also study certain preservation properties of mixtures of Harris family of distributions with regards to their baseline distributions. Comparison tools are various types of orderings, such as the usual, shifted, proportional and shifted proportional stochastic orderings. Several previous findings, regarding Marshall-Olkin family, follow as special cases of our results. We shall also fit a new Harris model to a real data set to illustrate the usefulness of our comparisons.

Keywords

• Marshall-Olkin Distribution
• Proportional Stochastic Ordering
• Shifted Stochastic Ordering
• Shifted Proportional Stochastic Ordering
• Usual Stochastic Ordering
• Reliability Function