Results 21 to 30 of about 369,033 (293)

A Ratio Estimator Under General Sampling Design

open access: yesAustrian Journal of Statistics, 2016
Recently, many authors introduced ratio-type estimators for estimating the mean, or the ratio, for a finite populations. Most of the articles are discussing this problem under simple random sampling design, with more assumptions on the auxiliary variable
Jehad Al-Jararha   +1 more
doaj   +1 more source

Study of Dual to Ratio-Cum-Product Estimator of Finite Population Mean under Double Sampling in Sample Surveys [PDF]

open access: yesJournal of Statistical Theory and Applications (JSTA), 2015
A class of estimator based on dual to ratio and dual to product-type estimator in double sampling for estimating finite population mean is proposed. The bias and mean square error of the proposed estimator are obtained in two different cases.
Sanjib Choudhury, Bhupendra Kumar Singh
doaj   +1 more source

Optimal Power Allocation for Channel Estimation in MIMO-OFDM System with Per-Subcarrier Transmit Antenna Selection [PDF]

open access: yes, 2015
A novel hybrid channel estimator is proposed for multiple-input multiple-output orthogonal frequency- division multiplexing (MIMO-OFDM) system with per-subcarrier transmit antenna selection having optimal power allocation among subcarriers.
Rajeswari, K., Thiruvengadam, S. J.
core   +2 more sources

Estimation of Variance Using Known Coefficient of Variation and Median of an Auxiliary Variable [PDF]

open access: yes, 2013
A modified ratio type variance estimator for estimating population variance of a study variable when the population median and coefficient of variation of an auxiliary variable are known is proposed.
Kumarapandiyan, G., Subramani, J.
core   +2 more sources

Log-Ratio Lasso: Scalable, Sparse Estimation for Log-Ratio Models [PDF]

open access: yesBiometrics, 2018
AbstractPositive-valued signal data is common in the biological and medical sciences, due to the prevalence of mass spectrometry other imaging techniques. With such data, only the relative intensities of the raw measurements are meaningful. It is desirable to consider models consisting of the log-ratios of all pairs of the raw features, since log ...
Stephen Bates, Robert Tibshirani
openaire   +4 more sources

Methods of sample adjustment. Improving the quality of survey results [PDF]

open access: yesRevista Română de Statistică, 2010
Statistical surveys, however well designed, often find that the resulting sample structure does not always reproduce the population structure accurately.In order to get more accurate estimators for the variables of interest, several methods of sample ...
Alina BARBU
doaj  

Optimized inferences of finite population mean using robust parameters in systematic sampling.

open access: yesPLoS ONE, 2023
In this article, we have proposed a generalized estimator for mean estimation by combining the ratio and regression methods of estimation in the presence of auxiliary information using systematic sampling.
Nazia Shaheen   +3 more
doaj   +1 more source

Estimation of the current population total for a four-phase sampling design

open access: yesNonlinear Analysis, 2016
The combined ratio-type estimators of the finite population total and their variances in the case of sample rotation for two-phase and four-phase sampling schemes are constructed in the paper.
Viktoras Chadyšas   +1 more
doaj   +1 more source

A ratio-cum-product estimator of population mean in stratified random sampling using two auxiliary variables

open access: yesStatistica, 2013
This paper proposes a ratio-cum-product estimator of finite population mean in stratified random sampling using information on population means of two auxiliary variables.
Rajesh Tailor   +3 more
doaj   +1 more source

A new exponential ratio-type estimator with linear combination of two auxiliary variables. [PDF]

open access: yesPLoS ONE, 2014
In sample surveys, it is usual to make use of auxiliary information to increase the precision of estimators. We propose a new exponential ratio-type estimator of a finite population mean using linear combination of two auxiliary variables and obtain mean
Jingli Lu, Zaizai Yan, Xiuyun Peng
doaj   +1 more source

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