MSE (y¯reg) ∼= 1− f n S 2 y (1−ρ 2 yx). (2)
Here f = n N and ρxy is the population correlation coefficient between yi and xi , [3, 20]. Kadilar and Cingi [1] proposed ratio estimators (KC estimators) by adapting the estimator’s type of Ray and Singh [21] to traditional and the other ratio estimators in SRS.