Results 31 to 40 of about 7,589,489 (318)

A Novel Family of Hybrid Neutrosophic Estimators for Population Mean Estimation [PDF]

open access: yesNeutrosophic Sets and Systems
This paper introduces a novel family of hybrid neutrosophic estimators for estimating the population mean when dealing with indeterminate data. Building upon neutrosophic statistics, we propose two innovative estimators that synergistically combine ratio-
Anisha Taneja, Sachin Malik
doaj   +1 more source

The Generalized Price Equation: Forces That Change Population Statistics

open access: yesFrontiers in Ecology and Evolution, 2020
The Price equation partitions the change in the expected value of a population measure. The first component describes the partial change caused by altered frequencies. The second component describes the partial change caused by altered measurements.
Steven A. Frank, William Godsoe
doaj   +1 more source

On the regression method of estimation of population mean from incomplete survey data through imputation [PDF]

open access: yes, 2005
When some observations in the sample data are missing, the application of the regression method is considered for the estimation of population mean with and without the use of imputation.
Shalabh, Toutenburg, Helge
core   +2 more sources

Mean-Field approximation and Quasi-Equilibrium reduction of Markov Population Models

open access: yes, 2014
Markov Population Model is a commonly used framework to describe stochastic systems. Their exact analysis is unfeasible in most cases because of the state space explosion.
Bortolussi, Luca, Paškauskas, Rytis
core   +1 more source

The Age of Cluster Galaxies from Continuum Colors [PDF]

open access: yes, 2008
We determine the age of 1,104 early-type galaxies in eight rich clusters ($z = 0.0046$ to $0.175$) using a new continuum color technique. We find that galaxies in clusters divide into two populations, an old population with a mean age similar to the age ...
Andrew Odell   +13 more
core   +2 more sources

An Alternative Ratio-cum-Product Estimator of Population Mean Using a Coefficient of Kurtosis for Two Auxiliary Variates

open access: yesData Science Journal, 2010
An alternative ratio-cum-product estimator of population mean using the coefficient of kurtosis for two auxiliary variates has been proposed. The proposed estimator has been compared with a simple mean estimator, the usual ratio estimator, a product ...
Rajesh Tailor   +2 more
doaj   +1 more source

Estimation of Population Mean Using Known Correlation Coefficient And Median [PDF]

open access: yesJournal of Statistical Theory and Applications (JSTA), 2014
The present paper deals with the two modified ratio estimators for estimation of population mean of the study variable using the linear combination of the known population values of the Correlation Coefficient and the Median of the auxiliary variable ...
J. Subramani, G. Kumarapandiyan
doaj   +1 more source

Improved procedures for mean estimation under non-response

open access: yesAlexandria Engineering Journal, 2022
In this paper, two generalized class such as ratio to exponential and the difference type of estimators have been proposed for estimating the finite population mean by utilizing information on higher order moments of an auxiliary variable in the two ...
Ashok K. Jaiswal   +2 more
doaj   +1 more source

Functional-integral based perturbation theory for the Malthus-Verhulst process

open access: yes, 2005
We apply a functional-integral formalism for Markovian birth and death processes to determine asymptotic corrections to mean-field theory in the Malthus-Verhulst process (MVP).
Dickman, Ronald, Moloney, Nicholas R.
core   +1 more source

Mean-Related Stochasticity and Population Variability

open access: yesOikos, 1993
Temporal variance in population density V is very generally related to mean density x by the power function, V = ax(b), with the value of b typically ranging from 1 to above 2 in different sets of data. We describe three simple Population dynamic models which are capable of generating variance-mean relationships with the observed range of b values.
Hanski, I., Woiwod, I. P.
openaire   +1 more source

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