Research Article

Generalized Chain Regression-cum-Chain Ratio Estimator for Population Mean under Stratified Extreme-cum-Median Ranked Set Sampling

Table 7

PRE of proposed estimator and existing estimators with respect to SRS for r = 5 and .

EstimatorNormalUniformGammaWeibullNormalUniformGammaWeibull
m = 10m = 15

206.824216.846188.386212.586228.355229.487231.586218.497
210.296245.194217.978229.386261.873227.397246.395238.243
216.723257.083251.153222.978274.867264.586258.593258.187
255.227292.275283.196261.354239.376244.397253.933290.907
299.589299.097290.472273.099287.988269.597297.397284.847
335.475327.164331.586349.486362.486364.386364.275368.486