- - - Department of Mathematics, College of Education for Pure Sciences, University of Thi-Qar, Thi-Qar, Iraq
- - - Department of Mathematics, College of Education for Pure Sciences, University of Thi-Qar, Thi-Qar, Iraq
- - - Department of Mathematics, University of Thi-Qar, Nasiriyah, Iraq

In this paper, we estimate the four parameters of Weibull Lindley burr distribution by using ordinary least square method and multiple regression least square method. The survival estimate made by using ordinary least square estimator (OLSE) and multiple regression estimator (MRE).  

Weibull Lindley burr XII distribution (WLBD), The ordinary least squares Method (OLSEM), Multiple Regression Least Squares Method (MRLSM)