2019

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Browsing 2019 by Author "HUMAIRA LATIF"

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    ESTIMATION OF THE POPULATION MEAN UNDER RANKED SET SAMPLING
    (UMT.Lahore, 2019-02-22) HUMAIRA LATIF
    In this thesis, exponential ratio and simple type estimators have been suggested for estimating finite population mean, using the information from auxiliary variable, under Ranked set sampling procedure. In chapter 1, the explanation about the ranked set sampling design and its modification with respect to exponential and simple ratio estimator has been given. The effect of ranking errors during ranked set sampling has also been discussed in this chapter. The previous work related to Ranked Set Sampling has been given in proceeding chapter 2 along with the use of auxiliary information in ranked set sampling design. In chapter 3 some existing estimator have been re-produced along with Mean Square Errors. Following the above chapters, the major contribution of this dissertation that leads to the epitome of the entire topic appears from the Chapter 4, three estimators are Proposed to estimate the population mean using different central tendencies of single auxiliary variable. Their Mean Square Error, Percentage Relative Efficiency and Biases are discussed in this chapter. Simulation study based on Monte Carlo technique is conducted in chapter 5. The efficiency comparison of the proposed estimators with the competitor estimators are performed. It has been founded that the proposed estimators are more efficient than competitive estimators under simple random sampling and ranked set sampling design. In chapter 6 theoretical results are supported with the help of three real life populations.