Temat: Distribution - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Bayesian estimation of a geometric distribution using informative priors based on a Type-I censoring scheme
Autorzy:: Akhtar, Nadeem
Khan, Sajjad Ahamad
Amin, Muhammad
Khan, Akbar Ali
Ali, Amjad
Manzoor, Sadaf
Tematy:: prior distribution
posterior distribution
geometric distribution
beta distribution
Kumraswamy distribution; Pokaż więcej
Wydawca:: Główny Urząd Statystyczny
Powiązania:: https://bibliotekanauki.pl/articles/20311948.pdf Link otwiera się w nowym oknie
Opis:: In this paper, the geometric distribution parameter is estimated under a type-I censoring scheme by means of the Bayesian estimation approach. The Beta and Kumaraswamy informative priors, as well as five loss functions are used for this purpose. Expressions of Bayes estimators and Bayes risks are derived under the Squared Error Loss Function (SELF), the Quadratic Loss Function (QLF), the Precautionary Loss Function (PLF), the Simple Asymmetric Precautionary Loss Function (SAPLF), and the DeGroot Loss Function (DLF) using the two aforementioned priors. The prior densities are obtained through prior predictive distributions. Simulation studies are carried out to make comparisons using Bayes risks. Finally, a real-life data example is used to verify the model’s efficiency.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: An experimental comparison of popular estimation methods for the Weibull, gamma and Gompertz distributions
Autorzy:: Żerda, Iwona
Opis:: The aim of this study was to describe some parametric estimation methods for the Weibull, gamma and Gompertz distributions and to identify among them estimators the most efficient in practical applications. Techniques which are considered as traditional methods, like the maximum likelihood (MLE) and the method of moments (MM) estimation but also some newer and less commonly used techniques like the Lmoment estimator (LME), least-square estimator (LSE), generalized spacing estimator (GSE) and percentile estimator (PE) were presented. The application of each method was demonstrated in a simulation study using data sets generated for different distribution parameters and sample sizes. Discussed estimators were compared in terms of their efficiency and bias measured by mean-square errors (MSE) based on the simulations results.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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na półce

Skocz do pozycji: 3.

Tytuł:: Beta transmuted Lomax distribution with applications
Autorzy:: Hurairah, Ahmed
Alabid, Abdelhakim
Tematy:: Lomax distribution
beta Lomax distribution
transmuted distribution
maximum likelihood estimation; Pokaż więcej
Wydawca:: Główny Urząd Statystyczny
Powiązania:: https://bibliotekanauki.pl/articles/1363592.pdf Link otwiera się w nowym oknie
Opis:: In this paper we propose and test a composite generalizer of the Lomax distribution .The genesis of the beta distribution and transmuted map is used to develop the so-called beta transmuted Lomax (BTL) distribution. The properties of the distribution are discussed and explicit expressions are derived for the moments, mean deviations, quantiles, distribution of order statistics and reliability. The maximum likelihood method is used for estimating the model parameters, and the finite sample performance of the estimators is assessed by simulation. Finally, the authors demonstrate the usefulness of the new distribution in analysing positive data.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: An Experimental Comparison of Popular Estimation Methods for the Weibull, Gamma and Gompertz Distributions
Autorzy:: Żerda, Iwona
Tematy:: parameter estimation
Weibull distribution
gamma distribution
Gompertz distribution
MSE; Pokaż więcej
Wydawca:: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Powiązania:: https://bibliotekanauki.pl/articles/1373468.pdf Link otwiera się w nowym oknie
Opis:: The aim of this study was to describe some parametric estimation methods for the Weibull, gamma and Gompertz distributions and to identify among them estimators the most efficient in practical applications. Techniques which are considered as traditional methods, like the maximum likelihood (MLE) and the method of moments (MM) estimation but also some newer and less commonly used techniques like the Lmoment estimator (LME), least-square estimator (LSE), generalized spacing estimator (GSE) and percentile estimator (PE) were presented. The application of each method was demonstrated in a simulation study using data sets generated for different distribution parameters and sample sizes. Discussed estimators were compared in terms of their efficiency and bias measured by mean-square errors (MSE) based on the simulations results.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 5.

Tytuł:: Evaluation of the Precision of Standardized Precipitation Index (SPI) Based On Years 1954-1995 in Łódź
Autorzy:: Gąsiorek, E.
Musiał, E.
Tematy:: standardized precipitation index
gamma distribution
normal distribution
lognormal distribution; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/123221.pdf Link otwiera się w nowym oknie
Opis:: This paper evaluates the accuracy of estimates of the Standardized Precipitation Index (SPI) using gamma, normal and log-normal distributions. In order to classify the above methods, the authors performed an analysis of the quality of theoretical distributions to empirical distribution, obtained on the basis of monthly precipitation sums during the vegetation season in a multi-year period 1954–1995 in Łódź.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 6.

Tytuł:: On the Bayes estimators of the parameters of inflated modified power series distributions
Autorzy:: Murat, Małgorzata
Szynal, Dominik
Tematy:: posterior distributions
posterior moments
Bayes estimator
inflated distribution
generalized Pareto distribution
generalized Poisson distribution
generalized negative binomial distribution
lost games distribution; Pokaż więcej
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Powiązania:: https://bibliotekanauki.pl/articles/729948.pdf Link otwiera się w nowym oknie
Opis:: In this paper, we study the class of inflated modified power series distributions (IMPSD) where inflation occurs at any of support points. This class includes among others the generalized Poisson,the generalized negative binomial and the lost games distributions. We derive the Bayes estimators of parameters for these distributions when a parameter of inflation is known. First, we take as the prior distribution the uniform, Beta and Gamma distribution. In the second part of this paper, the prior distribution is the generalized Pareto distribution.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Some notes on the asymmetry of empirical distributions
Kilka uwag o asymetrii rozkładów empirycznych
Autorzy:: Wesołowska-Janczarek, M.
Tematy:: asymmetry
empirical distribution
measurement
statistical distribution; Pokaż więcej
Wydawca:: Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Powiązania:: https://bibliotekanauki.pl/articles/2053070.pdf Link otwiera się w nowym oknie
Opis:: This paper discusses different aspects of asymmetry of empirical distributions. An attempt was made to clarify the definition of such distributions and to identify some of the problems associated with commonly used skewness coefficients of As and γ and their interpretation and those yet requiring further research.
W pracy r ozważane są różne aspekty asymetrii rozkładów empirycznych. Podjęto próbę sprecyzowania określenia takich rozkładów oraz wskazano pewne problemy związane z wykorzystywanymi powszechnie współczynnikami skośności As i γ oraz ich interpretacją a wymagające jeszcze dalszych badań.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Managing the company’s distribution system
Autorzy:: Kabus, Judyta
Nowakowska-Grunt, Joanna
Tematy:: company
distribution
distribution management
logistics; Pokaż więcej
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:: https://bibliotekanauki.pl/articles/1179493.pdf Link otwiera się w nowym oknie
Opis:: The effective distribution system plays an important role in a company, it means chances for success for a company and for maximized profit. Current company practices demonstrate that company’s distribution system management is conducted separately, with means of the departments of logistics and marketing. This article pertains to the company’s distribution system. The essence and functions of distribution are defined in the beginning. Then, distribution channels used in a company are described in detail. Finally, distribution strategies are described in detail.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Symulacyjne badanie szybkości zbieżności rozkładu statystyk do rozkładu normalnego
Simulation analysis of convergence of sample mean distribution to normal distribution
Autorzy:: Wywiał, Janusz L.
Krzciuk, Małgorzata
Mierzwa, Michał
Tematy:: sample mean distribution
normal distribution
convergence of sample mean distribution; Pokaż więcej
Wydawca:: Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Powiązania:: https://bibliotekanauki.pl/articles/434108.pdf Link otwiera się w nowym oknie
Opis:: The paper discusses studentized sample mean distribution. The sample is from exponential distribution. On the basis of independent replications of the samples empirical distributions studentized mean was calculated. The distance between the empirical distributions and the standard normal distribution was measured by means well known as statistics of Kolmogorov. Under the appropriate sample sizes the degree of the difference between the empirical and theoretical distributions was evaluated. Moreover, the hypothesis on normality of the empirical distributions was tested by means of the Kolmogorov test.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Multivariate negative binomial distributions generated by multivariate exponential distributions
Autorzy:: Kopociński, Bolesław
Tematy:: bivariate geometrical distribution
multivariate exponential distribution
multivariate negative binomial distribution; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Powiązania:: https://bibliotekanauki.pl/articles/1338938.pdf Link otwiera się w nowym oknie
Opis:: We define a multivariate negative binomial distribution (MVNB) as a bivariate Poisson distribution function mixed with a multivariate exponential (MVE) distribution. We focus on the class of MVNB distributions generated by Marshall-Olkin MVE distributions. For simplicity of notation we analyze in detail the class of bivariate (BVNB) distributions. In applications the standard data from [2] and [7] and data concerning parasites of birds from [4] are used.
Dostawca treści:: Biblioteka Nauki

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