‎In this paper‎, ‎we have studied the analysis an interval linear regression model for fuzzy data‎.

‎In section one‎, ‎we have introduced the concepts required in this thesis and then we illustrated linear regression fuzzy sets and some primary definitions‎. ‎In section two‎, ‎we have introduced various methods of interval linear regression analysis‎. ‎In section three‎, ‎we have implemented numerical examples of the chapter two‎. ‎Finally‎, ‎we have improved some methods of interval linear regression analysis that considered in section four‎. ‎We will showed performance of three methods by several examples‎. ‎All computations of examples are done by alabama package by R software‎.