Temat: exponential ratio type estimators - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Improved Estimators for Simple Random Sampling and Stratified Random Sampling under Second Order of Approximation
Autorzy:: Sharma, Prayas
Powiązania:: https://bibliotekanauki.pl/articles/465938.pdf
Data publikacji:: 2014
Wydawca:: Główny Urząd Statystyczny
Tematy:: simple random sampling
stratified random sampling population mean
study variable
exponential ratio type estimators
bias and MSE
Opis:: Singh and Solanki (2012) and Koyuncu (2012) proposed estimators for estimating population meanY. Up to the first order of approximation and under optimum conditions, the minimum mean squared error of both the estimators is equal to the MSE of the regression estimator. In this paper, we have tried to find out the second order biases and mean square errors of these estimators using information on auxiliary variable based on simple random sampling. Finally, we have compared the performance of these estimators with some numerical illustration.
Źródło:: Statistics in Transition new series; 2014, 15, 3; 379-390
1234-7655
Pojawia się w:: Statistics in Transition new series
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: A Class of Product-Type Exponential Estimators of the Population Mean in Simple Random Sampling Scheme
Autorzy:: Onyeka, A. C.
Powiązania:: https://bibliotekanauki.pl/articles/465727.pdf
Data publikacji:: 2013
Wydawca:: Główny Urząd Statystyczny
Tematy:: ratio-type and product-type exponential estimators
auxiliary character
simple random sampling
mean square error
Opis:: The present study proposes a class of product-type exponential estimators for estimating the population mean of the study variable, using known values of some population parameters of an auxiliary character, under the simple random sampling without replacement (SRSWOR) scheme. Furthermore, the study also proposes a modified exponential estimator based on both the ratio-type and the product-type exponential estimators. Properties of the proposed estimators, under the SRSWOR scheme, are obtained up to first order approximation. The modified exponential estimator under optimum conditions is shown to be more efficient than the simple sample mean and the ratio-type and product-type exponential estimators. The theoretical results are supported by an empirical illustration.
Źródło:: Statistics in Transition new series; 2013, 14, 2; 189-200
1234-7655
Pojawia się w:: Statistics in Transition new series
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Almost Unbiased Ratio and Product Type Exponential Estimators
Autorzy:: Yadav, Rohini
Upadhyaya, Lakshmi N.
Singh, Housila P.
Chatterjee, S.
Powiązania:: https://bibliotekanauki.pl/articles/465956.pdf
Data publikacji:: 2012
Wydawca:: Główny Urząd Statystyczny
Tematy:: study variable
auxiliary variable
almost unbiased ratio-type and product-type exponential estimators bias
mean squared error
Opis:: This paper considers the problem of estimating the population mean Y of the study variate y using information on auxiliary variate x. We have suggested a generalized version of Bahl and Tuteja (1991) estimator and its properties are studied. It is found that asymptotic optimum estimator (AOE) in the proposed generalized version of Bahl and Tuteja (1991) estimator is biased. In some applications, biasedness of an estimator is disadvantageous. So applying the procedure of Singh and Singh (1993) we derived an almost unbiased version of AOE. A numerical illustration is given in the support of the present study.
Źródło:: Statistics in Transition new series; 2012, 13, 3; 537-550
1234-7655
Pojawia się w:: Statistics in Transition new series
Dostawca treści:: Biblioteka Nauki

Artykuł

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