Temat: random error - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Estimating population coefficient of variation using a single auxiliary variable in simple random sampling
Autorzy:: Singh, Rajesh
Mishra, Madhulika
Powiązania:: https://bibliotekanauki.pl/articles/1186918.pdf
Data publikacji:: 2019-12-10
Wydawca:: Główny Urząd Statystyczny
Tematy:: coefficient of variation
simple random sampling
auxiliary variable
mean square error
Opis:: This paper proposes an improved estimation method for the population coefficient of variation, which uses information on a single auxiliary variable. The authors derived the expressions for the mean squared error of the proposed estimators up to the first order of approximation. It was demonstrated that the estimators proposed by the authors are more efficient than the existing ones. The results of the study were validated by both empirical and simulation studies.
Źródło:: Statistics in Transition new series; 2019, 20, 4; 89-111
1234-7655
Pojawia się w:: Statistics in Transition new series
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Some classes of modified ratio type estimators in sample surveys
Autorzy:: Swain, A. K. P. C.
Das, Manjula
Powiązania:: https://bibliotekanauki.pl/articles/466061.pdf
Data publikacji:: 2015
Wydawca:: Główny Urząd Statystyczny
Tematy:: ratio type estimator
simple random sampling
bias
mean square error
efficiency
Opis:: In this paper some classes of modified ratio type estimators with additive and multiplicative adjustments made to the simple mean per unit estimator and classical ratio estimator are suggested to obtain more efficient ratio type estimators compared to the classical one. Their biases and mean square errors are obtained and compared with first order approximations.
Źródło:: Statistics in Transition new series; 2015, 16, 1; 37-52
1234-7655
Pojawia się w:: Statistics in Transition new series
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Ratio estimation of two population means in two-phase stratified random sampling under a scrambled response situation
Autorzy:: Das, Pitambar
Singh, Garib Nath
Bandyopadhyay, Arnab
Powiązania:: https://bibliotekanauki.pl/articles/31342165.pdf
Data publikacji:: 2023-12-07
Wydawca:: Główny Urząd Statystyczny
Tematy:: stratified random sampling
scrambled response
auxiliary variable
mean square error
simulation study
Opis:: In this paper, we have described the development of an effective two-phase stratified random sampling estimation procedure in a scrambled response situation. Two different exponential, regression-type estimators were formed separately for different structures of two-phase stratified sampling schemes. We have studied the properties of the suggested strategy. The performance of the proposed strategy has been demonstrated through numerical evidence based on a data set of a natural population and a population generated through simulation studies. Taking into consideration the encouraging findings, suitable recommendations for survey statisticians are prepared for the application of the proposed strategy in real-life conditions.
Źródło:: Statistics in Transition new series; 2023, 24, 5; 45-61
1234-7655
Pojawia się w:: Statistics in Transition new series
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

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

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