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The purpose of writing this book is to suggest some improved estimators usingauxiliary information in sampling schemes like simple random sampling andsystematic sampling.  This volume is a collection of five papers. The following problems have beendiscussed in the book:  In chapter one an estimator in systematic sampling using auxiliaryinformation is studied in the presence of non-response. In second chapter someimproved estimators are suggested using auxiliary information. In third chaptersome improved ratio-type estimators are suggested and their properties arestudied under second order of approximation.  In chapter four and five some estimators are proposed for estimating unknownpopulation parameter(s) and their properties are studied.  This book will be helpful for the researchers and students who are working inthe field of finite population estimation.

On Improvement in Estimating Population Parameter(s) Using Auxiliary Information