A NEW MODIFIED RATIO ESTIMATOR FOR ESTIMATION OF POPULATION MEAN WHEN MEDIAN OF THE AUXILIARY VARIABLE IS KNOWN

The present paper deals with a modified ratio estimator for estimation of population mean of the study variable when the population median of the auxiliary variable is known. The bias and mean squared error of the proposed estimator are derived and are compared with that of existing modified ratio e...

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Bibliographic Details
Published in:Pakistan journal of statistics and operation research 2013-01, Vol.9 (2), p.137
Main Author: Subramani, Jambulingam
Format: Article
Language:English
Subjects:
Bias
Errors
Estimators
Mathematical models
Operations research
Pakistan
Statistics
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Summary:The present paper deals with a modified ratio estimator for estimation of population mean of the study variable when the population median of the auxiliary variable is known. The bias and mean squared error of the proposed estimator are derived and are compared with that of existing modified ratio estimators for certain known populations. Further we have also derived the conditions for which the proposed estimator performs better than the existing modified ratio estimators. From the numerical study it is also observed that the proposed modified ratio estimator performs better than the existing modified ratio estimators for certain known populations.
ISSN:1816-2711
2220-5810
DOI:10.18187/pjsor.v9i2.486