Aflake Hussain Shah Gardezi, Syed (14774) creator text Islamabad (unpublished) 2017 monographic 43+27 p. : ill. ; 29 cm. +CD Submitted in the fulfillment of the requirements for the degree of Master of Philosophy to the Faculty of Basic Science. Includes bibliographical references and appendix. Thesis supervisor: Dr. Saba Riaz Thesis (MPhil)--Riphah International University, 2017 English Variance Estimation Descriptive statistics Estimators-Variance Statistics FBSH 519.538 AFL