Results 11 to 20 of about 5,593,392 (326)
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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A new estimator for population total in the presence of missing data under unequal probability sampling without replacement: A case study on fine particulate matter in Northern Thailand [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2023 The issue of fine particulate matter in Thailand, especially in Northern Thailand, is an urgent problem that needs to be solved because of potential harm to human health. Prior estimates of fine particulate matter help planning how to reduce it.
Chugiat Ponkaew, Nuanpan Lawson
doaj
International Journal of Bio-Resource and Stress Management, 2023 Auxiliary variable is commonly used in survey sampling to improve the precision of estimates. Whenever there is auxiliary information available, the researchers want to utilize it in the method of estimation to obtain the most efficient estimator ...
Nitu Mehta (Ranka), Latika Sharma
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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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An Efficient General Family of Estimators for Population Mean in the Presence of Non-Response
Journal of Mathematical and Fundamental Sciences, 2017 This paper presents a new general family of estimators to estimate the population mean of study variable y in the presence of non-response when utilizing a known coefficient of variation of study variable y.
Thanapanang Rachokarn, Nuanpan Lawson
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Estimation of a Distribution function under Sampling on Two Occasions
Nonlinear Analysis, 2009 Estimation of the distribution function under sampling on two occasions with a simple random sampling design on each occasion is investigated. Composite regression and ratio type estimators are considered, using values of the study variable as auxiliary ...
V. Chadyšas
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Study of Dual to Ratio-Cum-Product Estimator of Finite Population Mean under Double Sampling in Sample Surveys [PDF]
Journal 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
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On Some Predictive Ratio Type Estimators in Two Stage Sampling [PDF]
Journal of Statistical Theory and Applications (JSTA), 2013 Some predictive ratio type estimators in two stage sampling are derived following the model free predictive criterion proposed by Basu (1971) and these estimators are compared with the classical multistage ratio estimator and also with Smith’s (1969 ...
A.K.P.C. Swain +2 more
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A New Median Based Ratio Estimator for Estimation of the Finite Population Mean
Statistics in Transition New Series, 2016 The present paper deals with a new median based ratio estimator for the estimation of finite population means in the absence of an auxiliary variable. The bias and mean squared error of the proposed median based ratio estimator are obtained.
J. Subramani
semanticscholar +1 more source