Results 21 to 30 of about 97,499 (261)
Confidence Intervals in Official Statistics: The Case of Lithuania
Lithuanian Journal of Statistics, 2012 In the paper, the application of confidence intervals in the surveys of official statistics is discussed. It is noticedthat there are situations where at the first sight natural normal distribution-based confidence intervals are not suitable ...
Andrius Čiginas
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The generalization of ratio-cum product estimator for the arbitrary sample design
Lietuvos Matematikos Rinkinys, 2009 The generalization of a dual to ratio-cum-product estimator of the finite population total for the arbitrary sample design is given. The approximate variance is calculated and variance estimator is constructed.
Ignas Bartkus, Aleksandras Plikusas
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Investigation of Accuracy of a Calibrated Estimator of a Ratio by Modelling
Nonlinear Analysis, 2005 Estimator of finite population parameter – ratio of totals of two variables – is investigated by modelling in the case of simple random sampling. Traditional estimator of the ratio is compared with the calibrated estimator of the ratio introduced by ...
V. Chadyšas, D. Krapavickaitė
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Selection Response in Finite Populations [PDF]
Genetics, 1996 Formulae were derived to predict genetic response under various selection schemes assuming an infinitesimal model. Account was taken of genetic drift, gametic (linkage) disequilibrium (Bulmer effect), inbreeding depression, common environmental variance, and both initial segregating variance within families (σAW02) and mutational (σM2) variance.
M, Wei, A, Caballero, W G, Hill
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Estimation of Some Proportion in a Clustered Population
Nonlinear Analysis, 2009 The aim of this paper is to show that the traditional design-based estimator for the proportion of population units, associated with at least one subunit having an attribute of interest using the two-stage sampling design, is biased.
D. Krapavickaitė
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Model‐based estimator of total expenditure on environmental protection
Mathematical Modelling and Analysis, 2007 Expenditure of enterprises on environmental protection has highly positive or zero values. Thus, distribution of such a variable is skewed, and its population variance is high. As a consequence the design‐based estimator of a total expenditure has a high
Danute Krapavickaite
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Time-Inhomogeneous Finite Birth Processes with Applications in Epidemic Models
Mathematics, 2023 We consider the evolution of a finite population constituted by susceptible and infectious individuals and compare several time-inhomogeneous deterministic models with their stochastic counterpart based on finite birth processes.
Virginia Giorno, Amelia G. Nobile
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Estimation of a quantile in finite population
Lietuvos Matematikos Rinkinys, 2002 An estimator of the quantile of a study variable distribution function in finite population and its confidence interval is proposed. The estimator is adapted to the two-stage cluster sample which is used in a household budget survey carried out in ...
Danutė Krapavickaitė
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Approximations to distribution of median in stratified samples
Lietuvos Matematikos Rinkinys, 2011 We consider an Edgeworth type approximation to the distribution function of sample median in the case of stratified samples drawn without replacement. We give explicit expression of this approximation, and also its empirical version based on bootstrap ...
Andrius Čiginas, Tomas Rudys
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Selection for sex in finite populations [PDF]
Journal of Evolutionary Biology, 2014 AbstractFinite population size generates interference between selected loci, which has been shown to favour increased rates of recombination. In this article, I present different analytical models exploring selection acting on a ‘sex modifier locus’ (that affects the relative investment into asexual and sexual reproduction) in a finite population.
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