Research Article

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

Table 6

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

EstimatorNormalUniformGammaWeibullNormalUniformGammaWeibull
m = 10m = 15

196.862201.754185.623201.852220.368219.184220.853213.762
199.286232.285203.722215.268251.623225.746237.354228.296
201.723247.972247.861207.718258.344258.296241.571253.285
245.835287.254270.868252.979221.381241.854247.297287.488
287.123282.926284.754251.175276.964263.186289.867279.197
315.199319.815325.131330.385350.362357.482358.478362.208