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A GENERAL CLASS OF ESTIMATORS IN TWO PHASE SAMPLING USING MULTI-AUXILIARY VARIABLES IN THE PRESENCE OF NON-RESPONSE AT SECOND PHASE

In this paper we have proposed a general class of estimators in two phase sampling using multi-auxiliary variables for estimating population mean of study variable in the presence of non-response for both study and auxiliary variables at second phase. Special cases of suggested class have also been deduced. The expressions of bias and mean square error have also been derived. Mathematical and empirical comparison has been made for comparing the efficiency of proposed estimators.