MANJARIYA, KAUSHAL GAJRAJSINH AN ENHANCED CHAIN RATIO TYPE EXPONENTIAL ESTIMATOR FOR MEAN USING TWO AUXILIARY CHARACTERS - JALANDHAR Department of Mathematics Dr. B.R. Ambedkar National Institute of Technology Jalandhar-144027 (India) 2023 - 51p THIS THESIS BELONGS TO DEPARMENT OF MATHEMATICS Dewey Class. No.: 519