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On Estimating Finite Population Mean in Simple and Stratified Random Sampling |
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| Authors: | Javid Shabbir Sat Gupta |
| Institution: | 1. Department of Statistics , Quaid-i-Azam University , Islamabad , Pakistan jsqau@yahoo.com;3. Department of Mathematics and Statistics , University of North Carolina at Greensboro , Greensboro , North Carolina , USA |
| Abstract: | The likelihood equations are given for the Weibull distribution with qtouped data* A numerical technique is described for calculating the asymptotic variance-covatiance matrix with grouped data. Results from a Monte Carlo study are then used to show that in son© cases the measured efficiencies obtained with grouped data are substantially better than those rrteasiired Cor partially grouped (censored! dataf contradicting the asymptotic efficiency predictions. |
| Keywords: | Bias Efficiency Exponential ratio estimator Mean square error Stratification |