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    Wyświetlanie 1-7 z 7
    Tytuł:
    Some Effective Estimation Procedures Under Non- Esponse in Two-Phase Successive Sampling
    Autorzy:
    Singh, G. N.
    Khetan, M.
    Maurya, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/465962.pdf
    Data publikacji:
    2016
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    non-response, successive sampling two-phase sampling
    mean square error
    optimum replacement strategy
    Opis:
    This work is designed to assess the effect of non-response in estimation of the current population mean in two-phase successive sampling on two occasions. Sub-sampling technique of non-respondents has been used and exponential methods of estimation under two-phase successive sampling arrangement have been proposed. Properties of the proposed estimation procedures have been examined. Empirical studies are carried out to justify the suggested estimation procedures and suitable recommendations have been made to the survey practitioners.
    Źródło:
    Statistics in Transition new series; 2016, 17, 2; 163-182
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    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
    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
    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
    Tytuł:
    Some Rotation Patterns in Two-Phase Sampling
    Autorzy:
    Singh, G. N.
    Prasad, Shakti
    Powiązania:
    https://bibliotekanauki.pl/articles/465915.pdf
    Data publikacji:
    2011
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    Two-phase, successive sampling
    auxiliary information
    chain-type
    bias
    mean square error
    optimum replacement policy
    Opis:
    A problem related to the estimation of population mean on the current occasion using two-phase successive (rotation) sampling on two occasions has been considered. Two-phase ratio, regression and chain-type estimators for estimating the population mean on current (second) occasion have been proposed. Properties of the proposed estimators have been studied and their respective optimum replacement policies are discussed. Estimators are compared with the sample mean estimator, when there is no matching and the natural optimum estimator, which is a linear combination of the means of the matched and unmatched portions of the sample on the current occasion. Results are demonstrated through empirical means of comparison and suitable recommendations are made.
    Źródło:
    Statistics in Transition new series; 2011, 12, 1; 25-44
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ratio-To-Regression Estimator In Successive Sampling Using One Auxiliary Variable
    Autorzy:
    Ralte, Zoramthanga
    Das, Gitasree
    Powiązania:
    https://bibliotekanauki.pl/articles/973550.pdf
    Data publikacji:
    2015
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    ratio-to-regression estimator
    auxiliary variable
    successive sampling
    bias
    mean square error
    optimum replacement policy
    Opis:
    The problem of estimation of finite population mean on the current occasion based on the samples selected over two occasions has been considered. In this paper, first a chain ratio-to-regression estimator was proposed to estimate the population mean on the current occasion in two-occasion successive (rotation) sampling using only the matched part and one auxiliary variable, which is available in both the occasions. The bias and mean square error of the proposed estimator is obtained. We proposed another estimator, which is a linear combination of the means of the matched and unmatched portion of the sample on the second occasion. The bias and mean square error of this combined estimator is also obtained. The optimum mean square error of this combined estimator was compared with (i) the optimum mean square error of the estimator proposed by Singh (2005) (ii) mean per unit estimator and (iii) combined estimator suggested by Cochran (1977) when no auxiliary information is used on any occasion. Comparisons are made both analytically as well as empirically by using real life data.
    Źródło:
    Statistics in Transition new series; 2015, 16, 2; 183-202
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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