Results 71 to 80 of about 331,520 (189)

Choice of Parametric and Nonparametric Statistical Procedures in Clinical and Biomedical Research

open access: yesSokoto Journal of Medical Laboratory Science, 2019
Statistical literacy is essential in biomedical research as an author or reader. Lack of basic statistical knowledge as well as inappropriate statistical tool choice hinders understanding of biomedical research as well as its application.
Okoroiwu, U.H.* and Akwiwu C.E.
doaj  

SCAD-penalized regression in high-dimensional partially linear models

open access: yes, 2009
We consider the problem of simultaneous variable selection and estimation in partially linear models with a divergent number of covariates in the linear part, under the assumption that the vector of regression coefficients is sparse.
Huang, Jian, Xie, Huiliang
core   +2 more sources

Estimation of the density of regression errors

open access: yes, 2006
Estimation of the density of regression errors is a fundamental issue in regression analysis and it is typically explored via a parametric approach. This article uses a nonparametric approach with the mean integrated squared error (MISE) criterion.
Efromovich, Sam
core   +1 more source

A loss function approach to model specification testing and its relative efficiency

open access: yes, 2013
The generalized likelihood ratio (GLR) test proposed by Fan, Zhang and Zhang [Ann. Statist. 29 (2001) 153-193] and Fan and Yao [Nonlinear Time Series: Nonparametric and Parametric Methods (2003) Springer] is a generally applicable nonparametric inference
Hong, Yongmiao, Lee, Yoon-Jin
core   +1 more source

ANALISIS MODEL REGRESI NONPARAMETRIK SIRKULAR-LINEAR BERGANDA

open access: yesE-Jurnal Matematika, 2016
Circular data are data which the value in form of vector is circular data. Statistic analysis that is used in analyzing circular data is circular statistics analysis.
KOMANG CANDRA IVAN   +2 more
doaj   +1 more source

Spectral statistics of large dimensional Spearman's rank correlation matrix and its application

open access: yes, 2015
Let $\mathbf{Q}=(Q_1,\ldots,Q_n)$ be a random vector drawn from the uniform distribution on the set of all $n!$ permutations of $\{1,2,\ldots,n\}$. Let $\mathbf{Z}=(Z_1,\ldots,Z_n)$, where $Z_j$ is the mean zero variance one random variable obtained by ...
Bao, Zhigang   +3 more
core   +2 more sources

The benchden Package: Benchmark Densities for Nonparametric Density Estimation

open access: yesJournal of Statistical Software, 2012
This article describes the benchden package which implements a set of 28 example densities for nonparametric density estimation in R. In addition to the usual functions that evaluate the density, distribution and quantile functions or generate random ...
Thoralf Mildenberger, Henrike Weinert
doaj  

Sparsity oracle inequalities for the Lasso

open access: yes, 2007
This paper studies oracle properties of $\ell_1$-penalized least squares in nonparametric regression setting with random design. We show that the penalized least squares estimator satisfies sparsity oracle inequalities, i.e., bounds in terms of the ...
Bunea, Florentina   +2 more
core   +1 more source

Estimation and model specification testing in nonparametric and semiparametric econometric models [PDF]

open access: yes
This paper considers two classes of semiparametric nonlinear regression models, in which nonlinear components are introduced to reflect the nonlinear fluctuation in the mean.
Gao, Jiti, King, Maxwell
core   +1 more source

Nonparametric Statistics on Magnetic Properties at the Footpoints of Erupting Magnetic Flux Ropes

open access: yesThe Astrophysical Journal
It is under debate whether the magnetic field in the solar atmosphere carries neutralized electric currents, in particular, whether a magnetic flux rope (MFR), which is considered the core structure of coronal mass ejections, carries neutralized electric
Rui Liu, Wensi Wang
doaj   +1 more source

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