Results 11 to 20 of about 979,711 (299)

An Evaluation of Testing Procedures for Event Study [PDF]

open access: yesتحقیقات مالی, 2013
This paper analyses efficiency of short horizon event study methodology in general and efficiency of various test statistics based on price and trading volume in the period (Iranian calendar) 1380:1389-q1 (2240 days) applying simulation method.
Mohammad hosein Ghaemi   +2 more
doaj   +1 more source

Evaluation of statistical approaches for association testing in noisy drug screening data

open access: yesBMC Bioinformatics, 2022
Background Identifying associations among biological variables is a major challenge in modern quantitative biological research, particularly given the systemic and statistical noise endemic to biological systems.
Petr Smirnov   +11 more
doaj   +1 more source

Normality assessment, few paradigms and use cases

open access: yesRomanian Journal of Laboratory Medicine, 2022
Background: The importance of applying the normality tests is underlined by the way of continuing the statistical protocol for numerical data within inferential statistics, respectively by the parametric or non-parametric tests that we will apply further
Avram Călin, Mărușteri Marius
doaj   +1 more source

Comparison of the strength of trend presence criteria in time series

open access: yesАвіаційно-космічна техніка та технологія, 2023
The subject of research is methods, mathematical models, and methods of continuous analysis of a multidimensional set of output variables and state variables of power and energy installations built on the basis of gas turbine engines, which in general ...
Volodymyr Myrhorod, Iryna Hvozdeva
doaj   +1 more source

Practical guide to using Kendall’s τ in the context of forecasting critical transitions

open access: yesRoyal Society Open Science, 2022
Recent studies demonstrate that trends in indicators extracted from measured time series can indicate an approach of an impending transition. Kendall’s τ coefficient is often used to study the trend of statistics related to the critical slowing down ...
Shiyang Chen   +2 more
doaj   +1 more source

Estatística aplicada à química: dez dúvidas comuns

open access: yesQuímica Nova, 2011
Ten common doubts of chemistry students and professionals about their statistical applications are discussed. The use of the N-1 denominator instead of N is described for the standard deviation.
Livia Maria Zambrozi Garcia Passari   +3 more
doaj   +1 more source

Non‐parametric statistics‐based predictor enabling online transient stability assessment

open access: yesIET Generation, Transmission & Distribution, 2018
Online transient stability assessment (TSA) is of great necessity for fast awareness of transient instability caused by fault contingencies. In this paper, a non-parametric statistics based scheme is proposed for response-based online TSA.
Tingjian Liu   +5 more
semanticscholar   +1 more source

NON-PARAMETRIC STATISTICS [PDF]

open access: yes, 1981
This chapter discusses non-parametric statistics. It discusses some additional uses of the χ 2 distribution. The chapter explains how to test the independence of two criteria of classification and how to test whether the population from which the sampling is done is normal.
H.T. Hayslett, Patrick Murphy
openaire   +1 more source

Comparação de duas metodologias de amostragem atmosférica com ferramenta estatística não paramétrica Comparison of two atmospheric sampling methodologies with non-parametric statistical tools

open access: yesQuímica Nova, 2005
In atmospheric aerosol sampling, it is inevitable that the air that carries particles is in motion, as a result of both externally driven wind and the sucking action of the sampler itself.
Maria João Nunes   +4 more
doaj   +1 more source

Estimación no paramétrica de la densidad y de la regresión - previsión no paramétrica

open access: yesRevista de Matemática: Teoría y Aplicaciones, 2009
We begin with a short wiew of non parametric estimation of density and regression; then we give details and interpretation of a forecasting method, called non parametric forecasting .
Michel Carbon, Christian Francq
doaj   +1 more source

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