Results 241 to 250 of about 136,469 (282)

Some Characterizations of the Log-Logistic Distribution

Stochastics and Quality Control, 2018
Abstract The log-logistic distribution is a right skewed distribution of a random variable whose logarithm has the logistic distribution. In this paper, characterizations based on truncated moments, functions of order statistics and record values are obtained. Also, limiting distributions for the extreme order statistics are studied.
Mohammad Ahsanullah, Ayman Alzaatreh
exaly   +3 more sources

Transmuted Log-Logistic Distribution

Journal of Statistics Applications & Probability, 2013
A generalization of the log-logistic distribution so-called the transmuted log-logistic distribution is proposed and studied. Various structural properties including explicit expressions for the moments, quantiles, mean deviations of the new distribution are derived. The estimation of the model parameters is performed by maximum likelihood method.
R. Aryal, Gokarna
openaire   +3 more sources

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Unit Log-Logistic Distribution and Unit Log-Logistic Regression Model

Journal of the Indian Society for Probability and Statistics, 2021
In this paper, the unit log-logistic distribution was proposed. This distribution is obtained through by transformation of a random variable with log-logistic distribution. The unit log-logistic has closed forms for the cumulative distribution function and quantile function.
exaly   +2 more sources

Reliability Test Plans for Exponentiated Log-Logistic Distribution

Economic Quality Control, 2006
Summary: A generalization of the log-logistic distribution, called exponentiated log-logistic distribution [in lines of the exponentiated Weibull distribution suggested by \textit{G. S. Mudholkar} et al., Technometrics 37, No. 4, 436--445 (1995)] is considered.
K Rosaiah, R R L Kantam
exaly   +2 more sources

Estimator based on percentiles for log-logistic distribution

2012 International Conference on Statistics in Science, Business and Engineering (ICSSBE), 2012
In this study, we consider the estimator based on percentiles for log-logistic distribution similar to the study of [6] and we also graph breakdown plots of the estimators that are considered below to have an opinion about robustness properties. The estimator based on percentiles is explicit functions of sample percentiles, thus, easy to compute and do
Arık, I., Mert Kantar, Yeliz
openaire   +3 more sources

Estimating the failure rate of the log-logistic distribution by smooth adaptive and bias-correction methods [PDF]

Computers and Industrial Engineering, 2021
The Log-logistic distribution has successfully earned attention in practical applications due to its good statistical properties. Because the traditional maximum likelihood estimators of the Log-logistic distribution parameters do not have an explicit ...
Jyun-You Chiang, Tzong-Ru Tsai
exaly   +2 more sources

Control Charts for the Log-Logistic Distribution

Economic Quality Control, 2006
Summary: This paper deals with the log-logistic distribution as a life time model. Control charts and the corresponding control limits are developed analogous to Shewhart-charts for the process mean and process range. The proposed control limits are compared with those of Shewhart in detecting out of control signals for various sample sizes.
Kantam, R. R. L., Vasudeva Rao, A., Srinivasa Rao, G.   +2 more
openaire   +2 more sources

The Odd Log-Logistic Log-Normal Distribution with Theory and Applications

Advances in Data Science and Adaptive Analysis, 2018
In this paper, a new heavy-tailed distribution is used to model data with a strong right tail, as often occuring in practical situations. The proposed distribution is derived from the log-normal distribution, by using odd log-logistic distribution. Statistical properties of this distribution, including hazard function, moments, quantile function, and ...
Ozel, Gamze, Altun, Emrah, Alizadeh, Morad, Mozafari, Mahdieh   +3 more
openaire   +2 more sources

Discriminating among Weibull, log-normal, and log-logistic distributions

Communications in Statistics - Simulation and Computation, 2017
ABSTRACTIn this article, we consider the problem of the model selection/discrimination among three different positively skewed lifetime distributions.
Mohammad Z. Raqab, Shafiqah A. Al-Awadhi, Debasis Kundu   +2 more
openaire   +1 more source

Estimation of parameters in logistic and log-logistic distribution with grouped data

Lifetime Data Analysis, 2007
In many situations, instead of a complete sample, data are available only in grouped form. For example, grouped failure time data occur in studies in which subjects are monitored periodically to determine whether failure has occurred in the predetermined intervals. Here the model under consideration is the log-logistic distribution.
Zhou, Yan Yan, Mi, Jie, Guo, Shengru
openaire   +2 more sources