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Modeling Investment Trends: A Logarithmic-Modified Markov Chain Approach
Springer Science and Business Media LLC - Tập 19 - Trang 439-445 - 2020
Imoh Udo Moffat, James Augustine Ukpabio, Emmanuel Alphonsus Akpan
The study aimed at stabilizing the changing variance using the logarithmic transformation to achieve a significant proportion of stability and a faster rate of convergence of the steady state transition probability in Markov chains. The traditional Markov chain and logarithmic-modified Markov chain were considered. On exploring the yearly data on the stock prices from 2015 to 2018 as obtained from...... hiện toàn bộ
The Kumaraswamy Pareto distribution
Springer Science and Business Media LLC - Tập 12 - Trang 129-144 - 2013
Marcelo Bourguignon, Rodrigo B. Silva, Luz M. Zea, Gauss M. Cordeiro
The modeling and analysis of lifetimes is an important aspect of statistical work in a wide variety of scientific and technological fields. For the first time, the called Kumaraswamy Pareto distribution, is introduced and studied. The new distribution can have a decreasing and upside-down bathtub failure rate function depending on the values of its parameters. It includes as special sub-models the...... hiện toàn bộ
Behavior of OC Curve of Generalized Exponentiated Data
Springer Science and Business Media LLC - Tập 19 - Trang 332-341 - 2020
Anwar Hassan, Mehraj Ahmad, Najmus Saquib Hassan
In this paper a generalized exponential distribution is considered for analyzing left-censored lifetime data as such mechanisms are applicable when the observations become available in an ordered manner with some cases where the origin and the event both occur prior to the start of follow-up. In the present study a test procedure is developed which will approximate a prescribed operating character...... hiện toàn bộ
Bounded Risk Estimation of the Gamma Scale Parameter in a Purely Sequential Sampling Procedure
Springer Science and Business Media LLC - Tập 18 - Trang 222-235 - 2019
Eisa Mahmoudi, Ghahraman Roughani, Ashkan Khalifeh
We consider the purely sequential procedure for estimating the scale parameter of a gamma distribution with known shape parameter, when the risk function is bounded by the known preassigned number. In this paper, we provide asymptotic formulas for the expectation of the total sample size. Also, we propose how to adjust the stopping variable so that the risk is uniformly bounded by a known preassig...... hiện toàn bộ
A Class of Exponential Regression Type Estimators for Population Variance in Two-Phase Sampling
Springer Science and Business Media LLC - Tập 16 - Trang 565-575 - 2017
A. Chatterjee, G. N. Singh, A. Bandyopadhyay
This article deals with the problems of efficient estimation of population variance in two-phase (double) sampling. Using information on two auxiliary variables, a class of chain exponential to regression type estimators has been proposed and its properties are studied under two different structures of two-phase sampling. Superiority of suggested class of estimators over some existing ones is esta...... hiện toàn bộ
On Inference of Overlapping Coefficients in Two Inverse Lomax Populations
Springer Science and Business Media LLC -
Hamza Dhaker, El Hadji Dème, Salah El-Adlouni
Odd Generalized Exponential Flexible Weibull Extension Distribution
Springer Science and Business Media LLC - Tập 17 - Trang 77-90 - 2018
Abdelfattah Mustafa, Beih S. El-Desouky, Shamsan AL-Garash
In this article we introduce a new four - parameters model called the odd generalized exponential flexible Weibull extension (OGE-FWE) distribution which exhibits bathtub-shaped hazard rate. Some of it’s statistical properties are obtained including ordinary and incomplete moments, quantile and mode, the moment generating functions, reliability and order statistics. The method of maximum likelihoo...... hiện toàn bộ
Generalized Exponential Estimator for the Estimation of Clustered Population Variance in Adaptive Cluster Sampling
Springer Science and Business Media LLC - Tập 18 - Trang 416-424 - 2019
Muhammad Nouman Qureshi, Ayesha Iftikhar, Muhammad Hanif
In this paper, we proposed a generalized exponential estimator with two auxiliary variables for the estimation of highly clumped population variance under adaptive cluster sampling design. The expressions of approximate bias and minimum mean square error are derived. A family of exponential ratio and exponential product estimator is obtained by using different values of generalized and optimized c...... hiện toàn bộ
Poly-Weighted Exponentiated Gamma Distribution with Application
Springer Science and Business Media LLC - Tập 19 Số 3 - Trang 446
E. B. Nkemnole, E. M. Ikegwu
Improved Randomized Response in Optional Scrambling Models
Springer Science and Business Media LLC - Tập 18 - Trang 351-360 - 2019
Zawar Hussain, Muhammad Imran Shahid
In the present study, we discuss the issue of increasing the respondents cooperation in sensitive surveys. When the question is highly sensitive then the cooperation from the respondents is decreased. We propose two optional randomized response models (ORRMs) to increase the respondents cooperation. A comparison of proposed ORRMs with [1] two- and three-stage models have been made. It is found tha...... hiện toàn bộ
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