The Book “Statistics Multiple Choice Questions Par-IV (Sampling theory, Design of experiment and Official Statistical system of India)” prepared and published by Shri Altaf Hussain Haji, ISS which is in about the various topics and concepts of Sampling, design of experiment and officials Statistical System of India. This book is being prepared for preparing various competitive examinations conduct by UPSC, SSC, SSRB of various states, UGC-CSIR-NET, etc. particularly for preparation for Indian Statistical Service Examination conducted by UPSC for posts of group ‘A’ service of Central Civil Service as Statisticians. The author has made every effort to give the touch of every content Sampling theory and Design of experiment of the syllabus of various examinations include questions of maximum topic of statistics which may be needed for preparation of various competitive examinations such as Indian statistical service(ISS) examination The material in this book is collected by author through various sources of subjects by own preparation of multiple choice questions and questions of previous years exanimations of different government organisation and institutions. Also, every attempt has been made to make this book very effective and helpful for any competitive examination with the help of experts of statistical persons. This book would be suitable as a text book for helping and applying concepts to prepare for various examinations of UPSC, SSC, UGC.CSIR (NET) .