Nath, N.Manjul, Jagan Nath2018-06-282018-06-281984http://krishikosh.egranth.ac.in/handle/1/5810055571The main researches in the field of sampling designs is to provides designs which enable estimation of population characteristics with maximum possible precision with available resources or the use of minimum resources for obtaining estimates with given margin of error The choice of a sampling design depends upon operational convenience / cost involved and the precision required. The precision can be measured by variance Historically simple random sampling is the first method used in sample surveys and other methods may of viewed as its modifications to control its inherent drawbacks. In simple random sampling, units are drawn one after another and all possible samples of a given size are equally likely.enStatisticsThesis