Faculty of Mathematics, BRS Classes, #2–284, Vivekananda Street, Hanumannagar, Ramavarappadu, Vijayawada,A.P., India e-mail: bbramasarma@yahoo.co.in
In estimating the parameters of a population if one can sacrifice the property of unbiasedness,better estimators in view of minimum mean squared error(MMSE) can be obtained.Estimators for Population mean using known coefficient of variation were proposed by Searles (1964), Srivastava(1974), Upadhyaya and srivastava (1976), But it is found that these estimators have not been compared. A comparison of the mean squared errors of (t, te), (t, te′), (tk, te) are studied in this paper and the results are presented.Larger gains are observed in efficiencies for small sample sizes.
