نتایج جستجو برای: non parametric statistics

تعداد نتایج: 1511597  

Journal: :international journal of agricultural management and development 2013
ebrahim moradi mosayeb pahlavani ahmad akbari hossain mehrabi bashrabadi

Journal: :journal of research in health sciences 0
ali reza soltanian hossein mahjub

background : kernel smoothing method is a non-parametric or graphical method for statistical estimation. in the present study was used a kernel smoothing method for finding the death hazard rates of patients with acute myocardial infarction. methods : by employing non-parametric regression methods, the curve estimation, may have some complexity.  in this article, four indices of epanechnikov, b...

Journal: :iranian journal of cancer prevention 0
alireza abadi dept. of community medicine and health, shahid beheshti university of medical sciences, tehran, iran farzaneh ahmadi dept. of biostatistics, school of paramedical, shahid beheshti university of medical sciences, tehran, iran hamaid alavi majd dept. of biostatistics, school of paramedical, shahid beheshti university of medical sciences, tehran, iran mohammad esmaeil akbari cancer research center, shahid beheshti university of medical sciences, tehran, iran zainab abolfazli khonbi dept. of english language, kashan university of medical sciences, kashan, iran esmat davoudi monfared dept. of community medicine and health, shahid beheshti university of medical sciences, tehran, iran

background: colon cancer is the third cause of cancer deaths. although colon cancer survival time has increased in recent years, the mortality rate is still high. the cox model is the most common regression model often used in medical research in survival analysis, but most of the time the effect of at least one of the independent factors changes over time, so the model cannot be used. in the c...

Journal: Iranian Economic Review 2015

The purpose of this study is estimation of daily Value at Risk (VaR) for total index of Tehran Stock Exchange using parametric, nonparametric and semi-parametric approaches. Conditional and unconditional coverage backtesting are used for evaluating the accuracy of calculated VaR and also to compare the performance of mentioned approaches. In most cases, based on backtesting statistics Results, ...

2003
I E Smolyarenko

We establish a general framework to explore parametric statistics of individual energy levels in unitary random matrix ensembles. For a generic confinement potential W (H), we (i) find the joint distribution functions of the eigenvalues of H and H = H + V for an arbitrary fixed V both for finite matrix size N and in the “thermodynamic” N → ∞ limit; (ii) derive manypoint parametric correlation f...

Journal: :Bioinformatics 2005
Matthew W. Dimmic Melissa J. Hubisz Carlos D. Bustamante Rasmus Nielsen

MOTIVATION The evolution of protein sequences is constrained by complex interactions between amino acid residues. Because harmful substitutions may be compensated for by other substitutions at neighboring sites, residues can coevolve. We describe a Bayesian phylogenetic approach to the detection of coevolving residues in protein families. This method, Bayesian mutational mapping (BMM), assigns ...

پایان نامه :دانشگاه رازی - کرمانشاه - دانشکده ادبیات و علوم انسانی 1393

in recent years, there has been a growing interest among researchers to investigate the relationship betweenteacher self-efficacy and classroom behavior management, especially students misbehavior. therefore, this study aimed to comparatively investigate english and arabic teachers’ use of different behavior managementstrategies, their self-efficacy, and their success in an iranian context. th...

2011
Vinod Kumar Prachi Mehta Gaurav Shukla

ABSTRACT In this paper, we have used SAS software for the multivariate analysis of repeated measures data due to Grizzel and Allen (1969). We have applied four multivariate methods viz MANOVA, Profile Analysis, non-parametric multisample rank sum test and non-parametric multisample median test to analyse two sets of data. The findings of the study reveal that profile analysis gives similar resu...

Journal: :Statistics in medicine 2006
Yuqing Yang Zhezhen Jin

In this paper, we propose a non-parametric approach for comparing diagnostic accuracies in multi-reader receiver operating characteristic (ROC) studies. The approach constructs a test from each reader by extending the conventional non-parametric method and then combines all the individual test statistics to draw an overall conclusion on the relative accuracies of different diagnostic tests. The...

2009
Anastasia Kostaki Javier M. Moguerza Alberto Olivares Stelios Psarakis

A topic of interest in demographic literature is the graduation of the age-specific fertility pattern. A classical graduation technique extensively used by demographers is to fit parametric models that accurately reproduce it. Standard non parametric statistical methodology, as kernels and splines, might alternately be used for this graduation purpose. Support Vector Machines (SVM) is an innova...

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