Results 51 to 60 of about 9,698 (163)

New Modified Gompertz Probability Distribution With Flexible Hazard Functions

Journal of Probability and Statistics
This paper introduces a new probability model called the modified Gompertz distribution from the base Gompertz distribution by combining its hazard function with first and second degree polynomial (linear and quadratic) functions.
Endalkachew Abebe Debelu, Ayele Taye Goshu   +1 more
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A Novel Gompertz-Type Distribution with Applications to Radiological Dose and Pharmacokinetic Data

Mathematics
This study introduces a novel four-parameter lifetime distribution constructed within the Topp–Leone Power Gompertz framework. Owing to its flexible structure, the proposed model accommodates a wide range of density shapes and hazard-rate patterns ...
Ayşe Metin Karakaş, Fatma Bulut, Sultan Şahin Bal   +2 more
doaj   +1 more source

Gompertz curves with seasonality [PDF]

Technological Forecasting and Social Change, 1994
This paper considers an extension of the usual Gompertz curve by allowing the parameters to vary over the seasons. This means that, for example, saturation levels can be different over the year. An estimation and testing method is proposed and illustrated with an example.
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Gompertz-Weibull {Gompertz} Type I: A Four-Parameter Generalization of the Weibull Family

Journal of Statistical Theory and Practice
AbstractIn this paper, we provide a construction method that provides greater flexibility in modeling real-world phenomenon by generalizing univariate probability distributions. The Gompertz distribution is used to provide new classes of models through T-X{Y} construction, in a manner we will define as a “proper” generalization, illustrated by ...
Scott Smith, Brenda Diaz-Martinez
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A bivariate Gompertz–Makeham life distribution

Journal of Multivariate Analysis, 2015
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Marshall, Albert W., Olkin, Ingram
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Cholecysto-Colonic Fistula: A Rare Case [PDF]

Libyan Journal of Medicine, 2007
A 72 year old female was referred by her general practitioner (GP) on the urgent two- week waiting list with a history of weight loss, diarrhoea and a mass on the right upper quadrant with a possible underlying malignancy.
Henry Gompertz, Abdulmajid Ahmed Ali
doaj  

Rancangan D-Optimal Model Gompertz dengan Maple

Media Statistika, 2017
Gompertz model is used in many areas including biological growth studies, animal and husbandry, chemistry, and agricultural. Locally D-optimal designs for Gompertz models with three parameters is investigated.
Tatik Widiharih, Budi Warsito
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Gamma-Gompertz life expectancy at birth

Demographic Research, 2013
BACKGROUND The gamma-Gompertz multiplicative frailty model is the most common parametric modelapplied to human mortality data at adult and old ages. The resulting life expectancy hasbeen calculated so far only numerically.
Trifon I. Missov
doaj  

Contribution Factors on Long- term and Short- term Survival of Thalassemia Major Patients

Journal of Biostatistics and Epidemiology, 2021
Background: Thalassemia major is an important health problem in Mediterranean countries, placing a tremendous emotional, psychological, and economic burden.
Sevda Riahifar, Mahboobe Rasouli, Jamileh Abolghasemi, Moein Yoosefi, Azita Azarkeivan, Asieh Ashouri   +5 more
doaj  

ON THE MOMENTS OF THE 3-PARAMETER GOMPERTZ DISTRIBUTION

Barekeng
Gompertz distribution is a classical probability distribution extensively used in actuarial science, reliability, and survival analysis. Gompertz distribution also plays a role in various fields, such as biology, economics, and marketing analysis.
Moch Taufik Hakiki, Dimaz Wisnu Adipradana, Imam Safawi Ahmad, Lahfanda Dista Permata Putri   +3 more
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