Results 31 to 40 of about 19,957,777 (200)

Modeling Heavy-Tailed Bounded Data by the Trapezoidal Beta Distribution with Applications

open access: yesRevstat Statistical Journal, 2022
In this paper, by using a new method, we derive the trapezoidal beta (TB) distribution and its properties. The TB distribution is a mixture model, generalizes both the beta and rectangular beta distributions, and allows one to describe bounded data with
Jorge Figueroa-Zúñiga   +3 more
doaj   +1 more source

Heavy-Tailed Density Estimation

open access: yes, 2022
A novel statistical method is proposed and investigated for estimating a heavy tailed density under mild smoothness assumptions. Statistical analyses of heavy-tailed distributions are susceptible to the problem of sparse information in the tail of the ...
Surya T. Tokdar (3922505)   +2 more
core   +1 more source

Fitting Heavy Tailed Distributions: The poweRlaw Package

open access: yesJournal of Statistical Software, 2015
Over the last few years, the power law distribution has been used as the data generating mechanism in many disparate fields. However, at times the techniques used to fit the power law distribution have been inappropriate.
Colin S. Gillespie
doaj   +1 more source

Environmental Factors May Drive the Post-release Movements of Surrogate-Reared Sea Otters

open access: yesFrontiers in Marine Science, 2020
Southern sea otters (Enhydra lutris nereis) are currently >80% depleted with respect to both abundance and range occupancy baselines, challenging the long-term persistence of the species and the ecosystem benefits their populations might provide. From
Sarah L. Becker   +5 more
doaj   +1 more source

A Heavy-Tailed QLindley Distribution for Modelling Skewed Lifetime Data

open access: yesMathematics
Lifetime data arising in engineering reliability, survival analysis, actuarial science, and environmental studies often exhibit substantial right-skewness, extreme observations, and heterogeneous hazard-rate structures.
Sajadul Hussain   +5 more
doaj   +1 more source

Scheduling for Heavy-Tailed and Light-Tailed Workloads in Queueing Systems [PDF]

open access: yes, 2012
In much of classical queueing theory, workloads are assumed to be light-tailed, with job sizes being described using exponential or phase type distributions. However, over the past two decades, studies have shown that several real-world workloads exhibit
Nair, Jayakrishnan U.
core   +1 more source

Minimum of heavy-tailed random variables is not heavy tailed / [PDF]

open access: yes, 2023
By constructing an appropriate example, we show that the class of heavy-tailed distributions is not closed under minimum. We provide two independent heavy-tailed random variables, such that their minimum is not heavy tailed.
Konstantinides, Dimitrios,   +2 more
core   +1 more source

A Locally Both Leptokurtic and Fat-Tailed Distribution with Application in a Bayesian Stochastic Volatility Model

open access: yesEntropy, 2021
In the paper, we begin with introducing a novel scale mixture of normal distribution such that its leptokurticity and fat-tailedness are only local, with this “locality” being separately controlled by two censoring parameters.
Łukasz Lenart   +2 more
doaj   +1 more source

Differentially Private Synthetic Heavy-tailed Data

open access: yes, 2023
The U.S. Census Longitudinal Business Database (LBD) product contains employment and payroll information of all U.S. establishments and firms dating back to 1976 and is an invaluable resource for economic research. However, the sensitive information in LBD requires confidentiality measures that the U.S. Census in part addressed by releasing a synthetic
Tran, Tran   +2 more
openaire   +2 more sources

Univariate Lp and ɭ p Averaging, 0 < p < 1, in Polynomial Time by Utilization of Statistical Structure

open access: yesAlgorithms, 2012
We present evidence that one can calculate generically combinatorially expensive Lp and lp averages, 0 < p < 1, in polynomial time by restricting the data to come from a wide class of statistical distributions.
John E. Lavery
doaj   +1 more source

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