M.Phil / MS
Permanent URI for this collectionhttps://repository.cuilahore.edu.pk/handle/123456789/63
This collection archives the complete set of theses produced by students of the COMSATS University Islamabad, Lahore Campus.
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Item GENERALIZED ESTIMATORS OF POPULATION MEAN IN TWO PHASE SAMPLING IN THE PRESENCE OF NON RESPONSE(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2016) Muhammad Taimoor Safdar; FA14-MSSTAT-003; Dr. Muhammad Ismail; LHR TP 4484In the mid of 1780’s, the famous mathematician Pierre Laplace thought to approximate the total French people by using the identified number of childbirths in a specified year and the estimated ratio of the population to annual births on the basis of population sample of 700 communes. However, his projected ratio was on no occasion recycled for its inventive purpose because it became problematic to obtain an appropriate total of childbirths for the entire French people due to many reasons including the military events against France during Napoleon’s early years.Item Ratio & Product estimators of mean using two-phase sampling in the presence of non-response(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2016) Muhammad Irfa; FA14-MSSTAT-001; Dr. Muhammad Ismail; LHR TP 4483Many statisticians have been worked in the field of two-phase sampling when there is a non-response in the data using a single auxiliary variable and multi-auxiliary variables for different cases which begin since Hansen and Hurwitz’s (1946) work on non response. In this study, new estimators of mean in the form of ratio and product are proposed for different cases of two-phase sampling using a single auxiliary variable for non-response. The mean square errors expressions of the proposed estimators are also derived. An empirical study is also conducted to assess the performance of the proposed estimators with existing estimators