Results 21 to 30 of about 1,457,940 (269)

A note on multiple imputation for method of moments estimation [PDF]

open access: yes, 2015
Multiple imputation is a popular imputation method for general purpose estimation. Rubin(1987) provided an easily applicable formula for the variance estimation of multiple imputation.
Kim, Jae Kwang   +2 more
core   +4 more sources

VARIANCE PREDICTION FOR POPULATION SIZE ESTIMATION

open access: yesImage Analysis and Stereology, 2019
Design unbiased estimation of population size by stereological methods is an efficient alternative to automatic computer vision methods, which are generally biased.
Ana Isabel Gomez   +2 more
doaj   +1 more source

Cluster-Robust Variance Estimation for Dyadic Data [PDF]

open access: yes, 2015
Dyadic data are common in the social sciences, although inference for such settings involves accounting for a complex clustering structure. Many analyses in the social sciences fail to account for the fact that multiple dyads share a member, and that ...
Aronow, Peter M.   +2 more
core   +3 more sources

Minority Challenge of Majority Actions in a Close Corporation in Italy and the United States [PDF]

open access: yes, 1959
This paper addresses the problem of segmenting a time-series with respect to changes in the mean value or in the variance. The first case is when the time data is modeled as a sequence of independent and normal distributed random variables with unknown ...
Annergren, Mariette   +2 more
core   +2 more sources

The Calculus of M-estimation in R with geex [PDF]

open access: yes, 2019
M-estimation, or estimating equation, methods are widely applicable for point estimation and asymptotic inference. In this paper, we present an R package that can find roots and compute the empirical sandwich variance estimator for any set of user ...
Hudgens, Michael G., Saul, Bradley C.
core   +3 more sources

Software Reliability Estimate with Duplicated Components Based on Connection Structure

open access: yesCybernetics and Information Technologies, 2014
Reliability testing of complex software at the system level is impossible due to the environmental constraint or the time limitation, so its reliability estimate is often obtained based on the reliability of subsystems or components.
Li Zhen, Tian Junfeng, Zhao Pengyuan
doaj   +1 more source

Estimation of Error Variance in Regularized Regression Models via Adaptive Lasso

open access: yesMathematics, 2022
Estimation of error variance in a regression model is a fundamental problem in statistical modeling and inference. In high-dimensional linear models, variance estimation is a difficult problem, due to the issue of model selection.
Xin Wang, Lingchen Kong, Liqun Wang
doaj   +1 more source

Regression Function and Noise Variance Tracking Methods for Data Streams with Concept Drift

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2018
Two types of heuristic estimators based on Parzen kernels are presented. They are able to estimate the regression function in an incremental manner. The estimators apply two techniques commonly used in concept-drifting data streams, i.e., the forgetting ...
Jaworski Maciej
doaj   +1 more source

Design-Based Approach for Analysing Survey Data in Veterinary Research

open access: yesVeterinary Sciences, 2021
Sample surveys are an essential approach used in veterinary research and investigation. A sample obtained from a well-designed sampling process along with robust data analysis can provide valuable insight into the attributes of the target population. Two
D. Aaron Yang, Richard A. Laven
doaj   +1 more source

Joint Decision-Directed Channel and Noise-Variance Estimation for MIMO OFDM/SDMA Systems Based on Expectation-Conditional Maximization [PDF]

open access: yes, 2011
A joint channel impulse response (CIR) and noise-variance estimation scheme is proposed for multiuser multiple-input–multiple-output (MIMO) orthogonal frequency-division multiplexing/space-division multiple access (OFDM/SDMA) systems, which is based on ...
Hanzo, Lajos   +2 more
core   +1 more source

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