Results 1 to 10 of about 368,914 (175)
Improved exponential type ratio estimator in double sampling for stratification [PDF]
Scientific Reports, 2023 The objective of this research is to create a chain-ratio-type exponential estimator in order to estimate the finite population mean in double sampling for stratification.
Anurag Gupta, Rajesh Tailor, Nitu Barod
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The chain ratio estimator and regression estimator with linear combination of two auxiliary variables. [PDF]
PLoS ONE, 2013 In sample surveys, it is usual to make use of auxiliary information to increase the precision of the estimators. We propose a new chain ratio estimator and regression estimator of a finite population mean using linear combination of two auxiliary ...
Jingli Lu
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Trimmed Density Ratio Estimation
, 2017 Density ratio estimation is a vital tool in both machine learning and statistical community. However, due to the unbounded nature of density ratio, the estimation procedure can be vulnerable to corrupted data points, which often pushes the estimated ...
Fukumizu, Kenji +3 more
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Estimating Diversity via Frequency Ratios [PDF]
Biometrics, 2015 SummaryWe wish to estimate the total number of classes in a population based on sample counts, especially in the presence of high latent diversity. Drawing on probability theory that characterizes distributions on the integers by ratios of consecutive probabilities, we construct a nonlinear regression model for the ratios of consecutive frequency ...
Willis, Amy, Bunge, John
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A new Separated Ratio Estimator in the stratified random sampling [PDF]
المجلة العراقية للعلوم الاحصائية, 2009 The aim of this research is to find a new separated ratio estimator in the stratified random sampling ,three other estimators are compared with the new separated ratio estimator , namely : ordinary separated ratio estimator , combined ratio estimator ...
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A two parameter ratio-product-ratio estimator using auxiliary information [PDF]
, 2012 We propose a two parameter ratio-product-ratio estimator for a finite population mean in a simple random sample without replacement following the methodology in Ray and Sahai (1980), Sahai and Ray (1980), Sahai and Sahai (1985) and Singh and Ruiz Espejo (
Chami, Peter S. +2 more
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Ratio-cum-product type exponential estimator
Statistica, 2013 This paper addresses the problem of estimating the population mean of the study variate Y using information on two auxiliary variables X1 and X2 . A ratio-cum-product type exponential estimator has been suggested and its bias and mean squared error have ...
Housila P. Singh +2 more
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Generalized ratio-cum-product type exponential estimation of the population mean in median ranked set sampling [PDF]
المجلة العراقية للعلوم الاحصائية, 2022 This study presents a proposal to estimate the finite population's mean of the main variable by median ranked set sampling through the generalized ratio-cum-product type exponential estimator.
Rikan .AL_Rahman, Saja Mohammad
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Ratio estimation in SIMS analysis [PDF]
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2011 The determination of an isotope ratio by secondary ion mass spectrometry (SIMS) traditionally involves averaging a number of ratios collected over the course of a measurement. We show that this method leads to an additive positive bias in the expectation value of the estimated ratio that is approximately equal to the true ratio divided by the counts of
Ogliore, R. C. +2 more
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Predictive Estimation of Population Mean in Ranked Set Sampling
Revstat Statistical Journal, 2019 The article presents predictive estimation of population mean of the study variable in Ranked Set Sampling (RSS). It is shown that the predictive estimators in RSS using mean per unit estimator, ratio estimator and regression estimator as predictor for ...
Shakeel Ahmed +2 more
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