Results 81 to 90 of about 28,068 (205)

A class of unbiased ratio estimators in two-phase sampling

, 2013
A class of unbiased ratio-type estimators in two (double) phases sampling has been constructed. It has been shown that Sukhatme's (1962) estimator is a particular member of the proposed class.
Biradar, R. S., Singh, Housila P.
core   +1 more source

An improved class of estimators in RR surveys [PDF]

, 2016
This work proposes a general class of estimators for the population total of a sensitive variable using auxiliary information. Under a general randomized response model, the optimal estimator in this class is derived.
Maria Del Mar Rueda, Cobo Rodríguez, Beatriz, Rueda García, María Del Mar, Arcos Cebrián, Antonio, Beatriz Cobo, Antonio Arcos   +5 more
core   +1 more source

An efficient class of estimators for finite population mean in the presence of non-response under ranked set sampling (RSS). [PDF]

PLoS One, 2022
Rehman SA, Shabbir J.
europepmc   +1 more source

A Superior Optimized Generalized Class of Estimators for Inference of Population Distribution Function Estimation Using Auxiliary Information

Mathematics
This paper presents an efficient improved generalized class of estimators for the precise estimation of the population distribution function using auxiliary information.
Abdulaziz S. Alghamdi, Sohaib Ahmad
doaj   +1 more source

An Improved Class of Chain Ratio-Product Type Estimators in Two-Phase Sampling Using Two Auxiliary Variables

Journal of Probability and Statistics, 2014
This paper presents a technique for estimating finite population mean of the study variable in the presence of two auxiliary variables using two-phase sampling scheme when the regression line does not pass through the neighborhood of the origin.
Gajendra K. Vishwakarma, Manish Kumar
doaj   +1 more source

A generalized class of estimators for sensitive variable in the presence of measurement error and non-response. [PDF]

PLoS One, 2022
Zahid E, Shabbir J, Gupta S, Onyango R, Saeed S.   +4 more
europepmc   +1 more source

Semiparametric Estimation with Generated Covariates [PDF]

In this paper, we study a general class of semiparametric optimization estimators of a vector-valued parameter. The criterion function depends on two types of infinite-dimensional nuisance parameters: a conditional expectation function that has been ...
Schienle, Melanie, Mammen, Enno, Rothe, Christoph   +2 more
core  

A Class of Estimators of Population Mean in Case of Post Stratification

, 2016
This paper proposes a class of ratio-cum-product type estimators in case of post-stratification. Particular members of the proposed class of ratio-cum-product type estimators have been identified and studied thoroughly from efficiency point of view.
Tailor, Rajesh, Lone, Hilal A.
core   +1 more source

Inadmissibility of a Class of Estimators of a Normal Quantile

The Annals of Mathematical Statistics, 1971
Suppose that independent normally distributed random vectors $W^{n\times 1}$ and $T^{k\times 1}$ are observed with $E(W) = 0, E(T) = \mu, \operatorname{Cov} (W) = \sigma^2 I$ and $\operatorname{Cov} (T) = \sigma^2 I$. In this paper it is shown that each member of a certain class of estimators of $\mu + \eta\sigma$ for a given vector $\eta$ is ...
openaire   +2 more sources

Inadmissibility of Usual and Mixed Estimators of Two Ordered Gamma Scale Parameters Under Reflected Gamma Loss Function

Journal of Mathematical Extension, 2009
Let Xi1, · · · , Xini be a random sample from a gamma distribution with known shape parameter νi > 0 and unknown scale parameter βi > 0, i = 1, 2, satisfying 0 < β1 6 β2.
Z. Meghnatisi, N. Nematollahi
doaj