Results 1 to 10 of about 520,005 (257)
Blind Additive Gaussian White Noise Level Estimation from a Single Image by Employing Chi-Square Distribution [PDF]
Entropy, 2022 The additive Gaussian white noise (AGWN) level in real-life images is usually unknown, for which the empirical setting will make the denoising methods over-smooth fine structures or remove noise incompletely.
Zhicheng Wang +4 more
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Pearson-Fisher Chi-Square Statistic Revisited
Information, 2011 The Chi-Square test (χ2 test) is a family of tests based on a series of assumptions and is frequently used in the statistical analysis of experimental data.
Radu E. Sestraş +4 more
doaj +3 more sources
IEEE Communications Letters, 2013 A simple and novel asymptotic bound for the maximum error resulting from the use of the central limit theorem to approximate the distribution of chi square and noncentral chi square random variables is derived. The bound enables the quick calculation of the number of degrees of freedom required to ensure a given approximation error, and is ...
Colin Murphy, Donagh Horgan
exaly +3 more sources
A normal approximation for the chi-square distribution [PDF]
Computational Statistics and Data Analysis, 2005 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Luisa Canal
exaly +3 more sources
Computation of cumulative density of noncentral chi-square distribution in Excel [PDF]
Tutorials in Quantitative Methods for Psychology, 2022 Noncentral distributions are obtained by transformation of their respective central distributions, and are identified by a noncentrality parameter. The noncentrality parameter measures the degree to which mean of test statistics departs, when the null ...
Sambaraju, Prasanth
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Performance analysis of WSN–FSO system modeled by Gamma–Chi-square channel distribution [PDF]
Proceedings of the Estonian Academy of Sciences, 2023 This paper presents the WSNâFSO (wireless sensor networkâfree-space optics) system based on CCR (corner cube retroreflector) and modeled with GammaâChi-square distribution.
Jelena Todorović +4 more
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Contributions to the Weighted Non-Central Chi-Square Distribution [PDF]
The Egyptian Statistical Journal, 2012 In this paper, we consider the probability density function (pdf) of the weighted non-central chi-square distribution with degrees of freedom. This pdf is presented in the literature as an infinitesum. Consequently we give another expression for this pdf
Sahar A.Ibrahim +2 more
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On the Distribution of Positive Linear Combination of Inverted Chi-Square Random Variables [PDF]
The Egyptian Statistical Journal, 2007 The distribution of positive linear combination of inverted chi-squared variables is considered for the general case involving inverted chi-square variables with odd or even degrees of freedom.
Amina Saleh
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A study of microbial distribution and cell phone hygiene awareness at Universiti Malaysia Kelantan, Jeli Campus [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2020 Cell phones are an essential device for today’s people. The warm environment on the cell phone may cause continuous growth of bacteria which can include harmful pathogens.
Valentina Anne Lopez +3 more
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New upper bounds for noncentral chi-square cdf
Журнал Белорусского государственного университета: Математика, информатика, 2020 Some new upper bounds for noncentral chi-square cumulative density function are derived from the basic symmetries of the multidimensional standard Gaussian distribution: unitary invariance, components independence in both polar and Cartesian coordinate ...
Valeriy A. Voloshko, Egor V. Vecherko
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